Please help!!

I don’t understand how to solve this since it’s format confuses me
Can someone explain how to answer it has to be a whole number or fraction.

Write as a single logarithm:
log 5 + 2

The student needs to score 94 in 5th to get an average of 94 points.

The term "average" generally refers to the arithmetic mean, which is a measure of central tendency calculated by adding up all the values in a dataset and then dividing by the total number of values.

Hence the formula used to calculate the average is

Average = [ Sum of observations]/ No of observations

Here we have

A student scored 98, 94, 96, and 88 points out of 100 on the last 4 tests.  

Here we need to at what score the average will be 94

Let x be the score the student got on 5 th test and the average is 94

Using the formula,

Average of the 5 test scores = [ 98 + 94 + 96 + 88 + x ]/ 5

As we assumed the average is 94

=>  [ 98 + 94 + 96 + 88 + x ]/ 5 = 94

=>  98 + 94 + 96 + 88 + x = 470  

=> 376 + x = 470

=> x = 94

Therefore,

The student needs to score 94 in 5th to get an average of 94 points.

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Required length of HF, angle H, angle F are 12.05 unit, 44.2°, 80.5° respectively.

How to find the length of the third side of a triangle when length of two sides are already given?

To find the length of the third side, HF, we can use the Law of Cosines, which states that:

c² = a² + b² - 2ab cos(C)

where c is the length of the side opposite angle C, and a and b are the lengths of the other two sides.

In this case, we have:

HF² = HG² + GF² - 2HG × GF × cos(HGF)

HF² = 7² + 13² - 2 × 7 × 13 × cos(136°)

HF² = 49 + 169 - 182cos(136°)

HF² ≈ 145.35

Taking the square root of both sides,

HF ≈ 12.05

So the length of the third side, HF, is approximately 12.05 units.

To find the angles, we can use the Law of Sines, which states that,

a/sin(A) = b/sin(B) = c/sin(C)

where a, b, and c are the lengths of the sides opposite angles A, B, and C, respectively.

In this case, we know the lengths of HG, GF, and HF, so we can find the angles H and F,

sin(H) / 7 = sin(136°) / 12.05

sin(H) ≈ 0.689

H ≈ 44.2°

sin(F) / 13 = sin(136°) / 12.05

sin(F) ≈ 0.992

F ≈ 80.5°

Therefore, the length of HF is approximately 12.05 units, the angle H is approximately 44.2°, and the angle F is approximately 80.5°.

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Answer:

Step-by-step explanation:

-(2x^2-x-3)

-(2x^2-3x+2x-3)

-[2x(x+1)-3(x+1)]

(x+1)(3-2x)

Based on these calculations, Option 3 yields the highest future value at age 35.

To compare the investment options at different ages, we can use the future value formula:

FV = PV * (1 + r)^t

where:

FV = future value of the investment

PV = present value or initial investment

r = annual growth rate (as a decimal)

t = number of years the investment grows

Here are the general equations for each option:

To compare the options at ages 20, 25, 30, and 35, calculate the future value for each option at those ages by plugging in the corresponding value of t.

Age 20:

FV1 = N/A (Option 1 hasn't started yet)

FV2 = 50 * (1 + 0.08)^0 = $50

FV3 = N/A (Option 3 hasn't started yet)

Age 25:

FV1 = N/A (Option 1 hasn't started yet)

FV2 = 50 * (1 + 0.08)^5 ≈ $73.86

FV3 = 100 * (1 + 0.07)^0 = $100

Age 30:

FV1 = 50 * (1 + 0.09)^0 = $50

FV2 = 50 * (1 + 0.08)^10 ≈ $107.95

FV3 = 100 * (1 + 0.07)^5 ≈ $140.26

Age 35:

FV1 = 50 * (1 + 0.09)^5 ≈ $77.16

FV2 = 50 * (1 + 0.08)^15 ≈ $157.46

FV3 = 100 * (1 + 0.07)^10 ≈ $196.72

Based on these calculations, Option 3 yields the highest future value at age 35.

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Answer:

The formula for area of a circle is A = π r²

Step-by-step explanation:

We have the diameter of the circle (8 kilometers) which gives us enough information to find the area of this cicle. We can find the radius from the dimeter (by using the simple formula r=d/2) the radius is always half of the diameter. So 8 km/2= 4 kilmeters so the radius is 4 kilometers.

now that we have the radius we can solve this problem

π×4²= 50.24

what I did was that I multiplied 3.14×4² than i got 50.24

since you want your answer in square km the answer would be 50.24²Kilometers

i hope this helps :)

happy studying!!!

Answer:

Solving 8x ÷ 4 = 100, we have:

2x = 100

x = 50

So the value of x is 50.

Answer:

x = 50

Step-by-step explanation:

To answer this question, we have to isolate the x. To do this, we have to get rid of any other numbers around it by doing the inverse of the operation.

1)

2)

This means that x is 50!

To check our answer is correct we can substitute 50 to x in the question...

It is correct!

Hope this helps, have a lovely day! :)

the solutions to the quadratic equation 1 = 2x^2 + 7x are:

[tex]x= \frac{(-7+\sqrt{51} )}{4}[/tex] and [tex]x= \frac{(-7-\sqrt{51})}{4}[/tex]

ToToToToToToToToToToToToToToToToToToToToToToToToToToToToToToToTo solve this quadratic equation by completing the square, we need to rewrite the equation in the form of (x + p)^2 + q = 0, where p and q are constants. This will allow us to solve for x.

First, we can factor out the coefficient of the x^2 term, which is 2:

[tex]2x^2 + 7x - 1 = 0[/tex]

Next, we can isolate the x^2 and x terms on one side of the equation by subtracting 1 from both sides:

[tex]2x^2 + 7x = 1[/tex]

Now, we need to add and subtract a constant term inside the parentheses to create a perfect square trinomial. To determine this constant term, we take half of the coefficient of the x term (which is 7/2) and square it:

[tex](\frac{7}{2} )^{2} = \frac{49}{4}[/tex]

So we add and subtract 49/4 inside the parentheses:

[tex]2x^2 + 7x + \frac{49}{4} - \frac{49}{4} = 1[/tex]

We can simplify the left side by factoring the perfect square trinomial:

[tex]2(x + \frac{7}{4} )^2 - \frac{51}{8} = 0[/tex]

Now, we can solve for x by isolating the perfect square term and taking the square root of both sides:

[tex]2(x + \frac{7}{4} )^2 = \frac{51}{8}[/tex]

[tex](x + \frac{7}{4} )^2 = \frac{51}{16}[/tex]

[tex]x + \frac{7}{4}=±\sqrt{\frac{51}{16} }[/tex]

[tex]x = -\frac{7}{4} ± \sqrt{\frac{51}{16} } /2[/tex]

Simplifying this expression, we get:

[tex]x = (-7 ±\sqrt{51} )/4[/tex]

Therefore, the solutions to the quadratic equation 1 = 2x^2 + 7x are:

[tex]x = (-7 + \sqrt{51} )/4 and x = (-7 -\sqrt{51} )/4.[/tex]

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(a) The probability of the questions being history, literature, and science in that order is 5/18 x 6/17 x 7/16, which is 0.04.

(b) The probability of all three questions being literature questions is 6/18 x 5/17 x 4/16, which is 0.024.

(c) The probability of the first question being science, the second history, and the third science is 7/18 x 5/17 x 7/16, which is 0.05.

In playing cards, it can be used to predict the likelihood of a certain outcome or to make decisions based on the probability of certain events occurring.

(a) The probability of the questions being history, literature, and science in that order is 5/18 x 6/17 x 7/16, which is 0.04.

(b) The probability of all three questions being literature questions is 6/18 x 5/17 x 4/16, which is 0.024.

(c) The probability of the first question being science, the second history, and the third science is 7/18 x 5/17 x 7/16, which is 0.05.

The probabilities of each of these scenarios can be calculated by multiplying the probabilities of drawing each of the three cards in the desired order.

For the first scenario, the probability of drawing a history question is 5/18, the probability of drawing a literature question is 6/17 (since there is one fewer card), and the probability of drawing a science question is 7/16 (since there are two fewer cards).

Multiplying these together gives us the probability of the questions being history, literature, and science in that order, which is 0.0771.

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the polynomial with zeros 0, -3, and 2 with multiplicities 2, 1, and 2 respectively is: f(x) = x⁵ - 8x⁴ - 4x³ + 48x² - 96xThe degree of this polynomial is 5, since the highest power of x in the polynomial is 5.

what is polynomial ?

A polynomial is a mathematical expression consisting of variables (also known as indeterminates) and coefficients, combined using arithmetic operations such as addition, subtraction, multiplication, and non-negative integer exponents.

In the given question,

If the zeros of a polynomial are given, we can construct the polynomial by multiplying its factors. Since the given zeros are 0, -3, and 2 with multiplicities 2, 1, and 2 respectively, we can write the factors of the polynomial as follows:

(x - 0)²(x - (-3))(x - 2)²

Simplifying this expression, we get:

x²(x + 3)(x - 2)²

Expanding this expression, we get:

x^²(x² - 4x - 12)(x - 2)²

Multiplying the factors and combining like terms, we get:

x⁵ - 8x⁴ - 4x³ + 48x² - 96x

Therefore, the polynomial with zeros 0, -3, and 2 with multiplicities 2, 1, and 2 respectively is:

f(x) = x⁵ - 8x⁴ - 4x³ + 48x² - 96x

The degree of this polynomial is 5, since the highest power of x in the polynomial is 5.

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Answer: x = [tex]\frac{1}{2}[/tex] , y= [tex]\frac{3}{2}[/tex]

Step-by-step explanation:

The expression 1 -25x² +10xy-y² in product form is (1-5x-y)(1+5x-y).

In mathematics, an expression is a combination of numbers, variables, and mathematical operations, such as addition, subtraction, multiplication, division, and exponentiation. Expressions can be simple, such as a single number or variable, or complex, involving multiple operations and variables. Expressions are used in a variety of mathematical contexts, including algebra, calculus, and geometry. They can be evaluated to obtain a numerical value, simplified by combining like terms or using algebraic identities, or used to represent mathematical relationships and patterns.

Here,

The given expression can be written as a product of two binomials as follows:

(1-5x-y)(1+5x-y)

Expanding this product gives:

1(1) + 5x(1) - y(1) - 5x(1) - 25x² + 5xy + y(1) - y(5x) - y²

Simplifying this expression gives:

1 - 25x² + 10xy - y²

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We know that z varies directly as √√x and inversely as y, which can be written as:

z = k(√√x)/y

where k is the constant of proportionality.

To find the value of k, we can use the values given when x = 25 and y = 7:

179 = k(√√25)/7

179 = k(5/7)

k = (179*7)/5

k = 250.6

Now we can use this value of k to find z when x = 64 and y = 4:

z = 250.6(√√64)/4

z = 250.6(2)/4

z = 125.3

Therefore, z ≈ 125.3 when x = 64 and y = 4.

The period of a sinusoidal graph is the distance between two consecutive peaks or troughs of the graph. From the given graph, we can see that the graph completes one full cycle from x = 0 to x = 2π. Therefore, the period of the graph is 2π.

The period of a sinusoidal graph is the distance between two consecutive peaks or troughs of the graph. It can be determined by calculating the length of one complete cycle of the graph.

The period of a sinusoidal graph tells us how often the function repeats itself. It is an important characteristic of the function that can help us analyze its behavior and make predictions about its future values.

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Answer:

3878.65

Step-by-step explanation:

Answer: 3876

Step-by-step explanation:

If you are asking how many months are in 323 years, then the answer is 3,876 months

323(12)

The value of every variable in the parallelogram is: a = 9 HK = 27.0 GK = 46 G = 63.5°

A parallelogram is a special type of quadrilateral that has both pairs of opposite sides parallel and equal.These shapes include squares, rectangles, rhombuses, and rhomboids. All of these shapes have four sides, four corners, and four angles

We know that sides of a parallelogram are parallel and congruent, as opposite angle

According to question  that GA equals HK, as:

46 is equal to 3a plus 19 When we subtract 19 from both sides, we get:

27 x 3a is the result of dividing both sides by 3:

we know that opposite angles in a parallelogram are congruent, we can use a = 9. Since angle H is 56 degrees, angle K must also be 56 degrees. The length of side HK can be determined using the Law of Cosines:

HK2 = GA2 + GK2 - 2(GA)(GK)cos(H) When we substitute the values we are familiar with, we obtain:

After solving the equation we obtain: HK2 = 462 + (3a + 19)2 - 2(46)(3a + 19)cos(56°).

HK2 = 2112 + 9a2 + 342a - 2764cos(56°) HK2 = 2112 + 9(9)2 + 342(9) - 2764cos(56°) HK2  732.4 By taking the square root of both sides, we obtain the following results:

∵ GA = 46, we can use the parallelogram's opposite sides being congruent to determine the length of side GK: HK  27.0

Then, we can use the Law of Cosines to determine the angle G's measurement:

cos(G) = (HK2 + GA2 - GK2) / (2(HK)(GA)) Using the values we are familiar with, we get,

cos(G) = (27.02 + 462 - 462) / (2(27.0)(46)) cos(G)  0.465 Using the inverse cosine, we get the following:

G ≈ 63.5°

Hence, the worth of every variable in the parallelogram is:

a = 9 HK = 27.0 GK = 46 G = 63.5°

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The vertices of the similar figure that results from the dilation and translation will be A'' = (2a - 1, 2b), B'' = (2c - 1, 2b), C'' = (2c - 1, 2d), and D'' = (2a - 1, 2d).

Assume that the rectangle's four vertices are A, B, C, and D, with the corresponding coordinates being (a, b), (c, b), (c, d), and (a, d).

First, enlarge the rectangle.

We must multiply the coordinates of each vertex by the scale factor of two in order to enlarge the rectangle. We can apply the following formulas because the centre of dilation is at (0, 0):

Old x-coordinate + 2 equals the new x-coordinate

Old y-coordinate + 2 times the new y-coordinate

Therefore, following dilation, the new coordinates for the vertices will be: A' = (2a, 2b)

B' = (2c, 2b)

C' = (2c, 2d)

D' = (2a, 2d)

Translate the Figure in Step 2

The x-coordinate of each vertex must be reduced by one in order to translate the figure one unit to the left. Therefore, following translation, the vertices' new coordinates will be: A' = (2a - 1, 2b)

B'' = (2c - 1, 2b)

C'' = (2c - 1, 2d)

D'' = (2a - 1, 2d)

As a result, A'' = (2a - 1, 2b), B'' = (2c - 1, 2b), C'' = (2c - 1, 2d), and D'' = (2c - 1, 2d) will be the vertices of the similar figure that comes from the dilation and translation. (2a - 1, 2d).

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The following question may be like this:

Suppose he got dilates the rectangle shown below with the center of dilation at 0,0 and a scale factor of 2, and then translates the figure 1 unit to the left. What will be the coordinates of the vertices of the similar figure that results

Step-by-step explanation:

Vertical angles of two crossing lines are equal so y = 163 degrees

  ... and  z = x    

Answer:

LM = 40

Step-by-step explanation:

since the triangles are similar then the ratios of corresponding sides are in proportion, that is

[tex]\frac{LM}{LO}[/tex] = [tex]\frac{LN}{LP}[/tex] ( substitute values )

[tex]\frac{LM}{5}[/tex] = [tex]\frac{14+2}{2}[/tex] = [tex]\frac{16}{2}[/tex] = 8 ( multiply both sides by 5 )

LM = 5 × 8 = 40

Answer:

(x^2+3)(3x-4)

Step-by-step explanation:

To answer this question we can employ a technique called factor by grouping. This strategy has us factor out values from the first two numbers and last two numbers to simplify the expression.

3x^3-4x^2+9x-12

x^2(3x-4)+3(3x-4)

(x^2+3)(3x-4)

Therefore, the answer is the second option.

Answer: The image of (8, 7) after a reflection over the line y = -x is (-7, -8).

Step-by-step explanation:

Thus, the mean and standard deviation for the randomly selected individuals is found as: mean = 80.1 and standard derivation = 7.66.

The standard deviation is a measurement of how widely spaced out a set of data is from the mean. The bigger the dispersion or variability, the higher the standard deviation and the greater the magnitude of the value's divergence from its mean. It represents the absolute variability of a distribution.

Given data:

Number of population n = 300

probability p = 0.267

Mean is given as np:

np = 300*0.267

np = 80.1

standard derivation: √np(1 - p)

√np(1 - p) =  √80.1(1 - 0.267)

√np(1 - p) =  √58.7133

√np(1 - p) =  7.66

Thus, the mean and standard deviation for the randomly selected individuals is found as: mean = 80.1 and standard derivation = 7.66.

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Correct question:

According to a study done by Nick Wilson of Otago University Wellington, the probability a randomly selected individual will not cover his or her mouth when sneezing is 0.267. Suppose you sit on a bench in a mall and observe 300 randomly selected individuals’ habits as they sneeze.

What are the mean and standard deviation?

Below 10 in.*6 in.*14 in., the triangular prism's volume is 420 cubic inches.

The area of the base must be multiplied by the prism's height in order to determine the volume of a triangular prism.

The base of this triangular prism is a triangle with a base of 6 inches and a height of 10 inches, so its area is:

Area of base = (1/2) × base × height = (1/2) × 6 in × 10 in = 30 in²

The height of the triangular prism is given as 14 inches.

Hence, the triangular prism's volume is:

Volume = Area of base × height = 30 in² × 14 in = 420 cubic inches.

So, the volume of the triangular prism is 420 cubic inches.

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Answer: y/5

Step-by-step explanation:

5 is the hypotenuse of the triangle and it always goes at the bottom of the fraction. Cosine is the closest two sides to the angle. Giving the answer y/5

Step-by-step explanation:

For RIGHT triangles ( such as this one) , remember S-O-H-C-A-H-T-O-A .

SinΦ =  Opposite LEG / Hypotenuse

Sin (53) = 4/x

The answer is x = 3 y=3. This can be solved by reorganising the equation 2x + 3y = 15, x-y=0.

This property is true for all real numbers, including integers, fractions, decimals, and any other real number. The Multiplication Zero Property states that the product of any number and zero is equal to zero.

Reorganising the equation:

2x + 3y = 15

x-y=0

To find the solution, multiply both parts of the equation by a multiplier, as in 2x+3y=15.

2(x-y)=0 x 2

Utilize the multiplicative distributional rule.

2x+3y=15

2x-2y=0 x 2

Application of the Multiplication Zero Property

2x+3y=15

2x-2y=0

Separate the two formulas: 2x+3y-(2x-2y)=15-0

2x+3y-2x+2y=15

Take the parentheses off

3+2=15

Expressions combined: 5y=5

Multiply both sides of the equation by the value of the variable: y = 15/5

Take out the joining piece. y=3

Substitute 0 for 2x-2x-2x in one of the computations.

2x-6=0 is used to determine the product.

In the calculation, 6 should be shifted to the left: 2x=6

Add the variable's value to both ends of the equation, then subtract it:

x = 6/2

Take out the intermediary: 2 = 3

The  answer is x = 3 y=3.

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The percent markdown rounded to the nearest percent is 13%.

Markdown represents the difference between the original or full price of an item and the current price that's reduced. It's typically expressed as a percentage.

To find the percent markdown, we first need to calculate the amount of markdown, which is the difference between the original price and the sale price:

Markdown = $175.90 - $153.77 = $22.13

Next, we need to find the percent markdown by dividing the markdown by the original price and multiplying by 100:

Percent Markdown = (Markdown / Original Price) x 100

Percent Markdown = ($22.13 / $175.90) x 100

Percent Markdown = 0.1258 x 100

Percent Markdown = 12.58%

Rounded to the nearest percent, the percent markdown is 13%.

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There is a 1.8% probability that a customer will buy clothes, shoes, AND jewelry.

This statement is false. The probability that a customer buys clothes, shoes, and jewelry is not given

How to solve the problem ?

Let's denote the event that a customer buys clothes by C, the event that a customer buys jewelry by J, and the event that a customer buys shoes by S. We are given that the probabilities of these events are independent. Therefore, the probability of a customer buying clothes and shoes, denoted by C and S, is simply the product of the probabilities of buying clothes and buying shoes, which is 0.6 × 0.3 = 0.18. Similarly, the probability of a customer not buying shoes and buying jewelry, denoted by S' and J, is simply the product of the probabilities of not buying shoes and buying jewelry, which is 0.7 × 0.1 = 0.07.

Using these probabilities, we can now check the statements:

There is a 15% probability that a customer buys NO clothes, NO shoes, and NO jewelry.

This statement is true. The probability that a customer buys none of these items is simply the complement of the probability that the customer buys at least one of them. Using the inclusion-exclusion principle, we have:

P(C ∪ J ∪ S) = P(C) + P(J) + P(S) - P(C ∩ J) - P(C ∩ S) - P(J ∩ S) + P(C ∩ J ∩ S)

P(C ∪ J ∪ S) = 0.6 + 0.1 + 0.3 - 0 - 0.18 - 0 + P(C ∩ J ∩ S)

P(C ∪ J ∪ S) = 0.52 + P(C ∩ J ∩ S)

Therefore, the probability that a customer buys none of these items is:

P((C ∪ J ∪ S)') = 1 - P(C ∪ J ∪ S) = 0.48 - P(C ∩ J ∩ S)

We are not given the value of P(C ∩ J ∩ S), but we know that it cannot be negative. Therefore, the maximum value of P((C ∪ J ∪ S)') is 0.48, which corresponds to the case where P(C ∩ J ∩ S) = 0. In this case, the probability that a customer buys none of these items is 0.48, which is 15% of 1.

There is a 70% probability that a customer does NOT buy shoes.

This statement is true. The probability that a customer does not buy shoes is simply the complement of the probability that the customer buys shoes, which is 0.3. Therefore, the probability that a customer does not buy shoes is 1 - 0.3 = 0.7, which is 70% of 1.

There is an 8.5% chance that a customer buys jewelry.

This statement is false. The probability that a customer buys jewelry is not given directly. However, we can use the information about the probability of not buying shoes and buying jewelry to find it. We have:

P(S' ∩ J) = P(S') × P(J) = 0.7 × 0.1 = 0.07

Therefore, the probability that a customer buys jewelry is:

P(J) = P(S' ∩ J) + P(S ∩ J) = 0.07 + 0 = 0.07

This is 7% of 1, not 8.5%.

There is a 1.8% probability that a customer will buy clothes, shoes, AND jewelry.

This statement is false. The probability that a customer buys clothes, shoes, and jewelry is not given

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Now, we can write the matrix equation as:

AX = B

| 2 -6 -2 | | x | | 1 |

| 0 3 -2 | | y | = | -5 |

| 0 2 2 | | z | | -3 |

To write the given system of equations as a matrix equation, we will represent it in the form AX = B, where A is the matrix of coefficients, X is the column matrix of variables, and B is the column matrix of constants.

Given a system of equations:

We can represent the matrices as follows:

A = | 2 -6 -2 |

| 0 3 -2 |

| 0 2 2 |

X = | x |

| y |

| z |

B = | 1 |

| -5 |

| -3 |

Now, we can write the matrix equation as:

AX = B

| 2 -6 -2 | | x | | 1 |

| 0 3 -2 | | y | = | -5 |

| 0 2 2 | | z | | -3 |

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The interval in which the inequality is true is:

-1 < x < 1

Here we know that:

f(x) = |x|

g(x) = x²

Now, remember that in a product:

a*A

we have:

|a*A | > a   if A > 1.

|a*A| < a    if A < 1.

So, in a square like in g(x) = x²

if  -1 < x < 1

Then the outcome will be smaller than the input, because we are multiplying by a numer smaller than 1.

Then:

f(x) > g(x)

|x| > x²

In the interval -1 < x < 1

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