No, this is not an accurate predictor because angie is not representative of the population in the algebra test.
Here,
Angie, a student in an advanced statistics course, was given an algebra test and she scored 80%.
We have to find is this an accurate predictor.
What is Accurate predictor?
Accurate predictor describes whether the predicted values match the actual values of the target field within the incertitude due to statistical fluctuations and noise in the input data values.
Here,
Angie is the student of an advanced statistics course but she gives the algebra test and scored 80%.
We know that the advanced statistics is the higher level of math so it is not an accurate predictor.
Because, An accurate predictor should be applied when the person is 100% confirmed to the related thing. So in the given situation, the student is not 100% confirm.
Hence, this is not an accurate predictor because Angie is not representative of the population in the algebra test.
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The length of a rectangle is twice the width. The area of the rectangle is 90 square unites
A Which irrational number represents the length of each side of the square?
B Estimate the length and width of the rectangle
a) Both the length and the width of the rectangle are square roots of integers.
b) The length and the width of the rectangle are 6√5 units and 3√5 units, respectively.
How to analyze irrational numbers
Irrational numbers are numbers that not rational, that is, numbers that not of the form m / n, where m and n are integers and n is different of zero. Rational numbers may be integers or not.
Now, the statement indicates that the length and the width of rectangle have measures of 2 · x and x, respectively, and that the area of the rectangle is equal to 90 square units. The area formula is presented below:
90 = (2 · x) · x
90 = 2 · x²
x² = 45
x = √45
x = √(9 × 5)
x = √9 × √5
x = 3√5
a) Both the length and the width of the rectangle are square roots of integers.
b) The length and the width of the rectangle are 6√5 units (approx. 13.416 units) and 3√5 units (approx. 6.708 units), respectively.
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a bee flies at 20 feet per second directly to a flowerbed from its hive. the bee stays at the flowerbed for 14 minutes, and then flies directly back to the hive at 16 feet per second. it is away from the hive for a total of 19 minutes.
Distance, D = 5,760,000/2,160 = 2666.67 (approx)
What is time function?The Excel DATE/TIME capabilities include the TIME Function. We can construct a time using distinct hour, minute, and second components with the aid of TIME.
We might want to date a report while performing financial analysis. In these circumstances, TIME can be used to transform a text string into a format that indicates the time in decimal form. Additionally, the function can be used to combine different values into a single time value.
formula= TIME (hour, minute, second)
distance = rate X time
D = RT
T = D/R
20 feet per second = 1200 feet per minute
16 feet per second = 960 feet per minute
[of minutes to flowerbed] + 14 minutes + [of minutes back to hive] = 19 minutes
(D/R) + 14 + (D/R) = 19
(D/R) + 14 + (D/R) = 19
(D/1200) + 14 + (D/960) = 19, This is the equation we can use to find the distance from the flowerbed to the hive.
(D/1200) + (D/960) = 5
(D(1200)(960))/1200 + (D(1200)(960))/960 = 5(1200)960
960D + 1200D = 5(1200)960
2,160D = 5,760,000
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HELP! 25 POINTS
Factorise: √ab(x² +1) + x(a+b)
Determine the range of f(x) = |x| + 3
The range of the function f(x) = |x|+3 is [3,∞)
Given,
The function f(x) =|x|+3
Consider
f(0)=|0|+3= 3
f(1)=|1|+3= 4
f(2)=|2|+3= 5
We know
|x|≥0
So even if we take negative value for x, the |x| will be positive
So,
f(-1)=|-1|+3=1+3=4
f(-2)=|-2|+3= 2+3=5
We know, range is the set of all possible outcomes.
The range of the function f(x)= |x|+3 = [3,∞)
Hence, the range of the function f(x) = |x|+3 is [3,∞).
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Answer:
{y | 3 ≤ y < ∞}
Step-by-step explanation:
whats the transformation
Answer:translation
Step-by-step explanation:
b. For mixing a spray to kill weeds, Howard is to
use 2 1/2 tablespoons for each gallon of water.
How many tablespoons of the spray will he
need to use for 5 gallons of water.
The 12.5 tablespoons of the spray will he need to use for 5 gallons of water.
What is arithmetic?
Arithmetic is the branch of mathematics that deals with the study of numbers using various operations on them. Basic operations of math are addition, subtraction, multiplication and division. These operations are denoted by the given symbols.
Given:
For mixing a spray to kill weeds, Howard is to use 2 1/2 tablespoons for each gallon of water.
We have to find How many tablespoons of the spray will he need to use for 5 gallons of water..
According to given question we have
2 1/2 =5/2 tablespoons for each gallon of water.
5/2 tablespoons =1 gallon of water.
1 gallon of water=5/2 tablespoons
5 gallons of water=5/2*5 tablespoons
5 gallons of water=25/2 tablespoons=12.5 tablespoons
Therefore, the 12.5 tablespoons of the spray will he need to use for 5 gallons of water.
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what is 9^256? will give brainliest
Answer:
1.93233498E244
Step-by-step explanation:
Answer:
3.14159265
Step-by-step explanation:
a man and a woman, both with brown eyes (bb), have a child. what is the percentage chance that the child will have blue eyes?
Find the derivative of the function by the limit process.
f(x)=(3)/(x-2)
Functions are expressed by writing a variable in terms of other variables known as the independent. The derivative of the given function is -3/(x-2)².
Derivative of a functionGiven the function below;
f(x) = 3/x-2
Since it is a quotient, we can use the quotient rule to express the equation as shown:
let u = 3 and v = x -2
du/dx = 0 and dv/dx = 1
According to the rule;
dy/dx = (x-2)(0) - 3(1)/(x-2)²
dy/dx = 0-3/(x-2)²
dy/dx = -3/(x-2)²
Hence the derivative of the given function is -3/(x-2)²
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the names of 0 employees are written on 0 cards. the cards are placed in a bag, and three names are picked from the bag. what sampling technique was used?
The names of 0 employees are written on 0 cards. the cards are placed in a bag, and three names are picked from the bag - here simple random sampling technique was used.
What is simple random sampling?Basic irregular testing can provide you with an extremely precise image of how your motto performs with the typical individual, yet it won't give you nitty gritty data about unambiguous gatherings. Utilizing straightforward irregular testing permits scientists to make speculations about a particular populace and leave out any inclination. This can assist with deciding how to settle on future choices. It has been expressed that "the rationale behind straightforward arbitrary examining is that it eliminates predisposition from the choice method and ought to bring about delegate tests".
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How do you evaluate a function?
Answer:
evaluating a function means finding the value of f(x) or f(y).......
Answer:
replace all the x variables with whatever x has been assigned
Step-by-step explanation:
evaluating a function means finding the value of f (x) = or y equals that corresponds to a given value of x to do this simply replace all the x variables with whatever x has been assigned for example if we are asked to evaluate f (4) then x has been assigned the value of 4
the median of 6 consecutive integers is 9. what is the largest number
If the median of 6 consecutive integers is 9, the largest number is equal to 8.5.
Given the following data:
Median, M = 9.Number of consecutive integers, n = 6.What is a median?In Mathematics, a median can be defined as the middle number (center) of a sorted data set, which is when the data set is arranged in from the greatest to least or the least to greatest.
In Mathematics, the median of a data set is generally considered to be a better measure of center than the mean when there's an outlier in the data set.
For the largest number, we have:
Since consecutive integers must follow each other sequentially with a difference of 1, so the largest number is given by:
Largest number = Median + (n - 1)/2
Substituting the given parameters into the formula, we have;
Largest number = 6 + (6 - 1)/2
Largest number = 6 + (5)/2
Largest number = 6 + 2.5
Largest number = 8.5.
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Given: B is between A and C, AB = 3x -4, BC = 4x + 2, and AC = 26. What is the value of x?
A. 6
B. 4
C. 3.7
D. 5
Answer:
B
Ab + bc =ac
3x-4 + 4x+2 =26
7x=28
x=4
If m ∠ F L G = ( 14 x + 5 ) ° and m ∠ H L G = ( 17 x − 1 ) ° , find m ∠ F L H .
The value of m ∠ F L H is 57°
How to determine the valueFrom the information given, we have that
m ∠ F L G and m ∠ H L G are congruent angles
Note that congruent angles are angles are equal or equivalent to each other
Given that;
m ∠ F L G = ( 14 x + 5 ) ∠ H L G = ( 17 x − 1 ) °Equate the expression for both angles
14x + 5 = 17 x − 1
collect like terms
14x - 17x = -1 - 5
Subtract like terms
-3x = -6
Make 'x' the subject of formula
-3x/-3 = -6/-3
x = 2
But we know that;
m ∠ F L G = ( 14 x + 5 ) = 14(2) + 5 = 28 + 5= 33°
m ∠ F L H = 90 - 33 = 57°
Thus, the value of m ∠ F L H is 57°
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Systems of equations with graphing
The correct option is A. x = 1(1/3) and y = 2(1/3) in the mixed fractions.
What is defined as the system of equations?A system of equations is a collection of equations that all have the same variables.
If all of the equations are linear, you get a system of linear equations! To fix a system of equations, you must first determine the variable values that will solve all of the equations involved.A solution to an equation system is a set of variable values that satisfy all of the equations at the same timeNow, the given equation in the question are-
7x - y = 7 ........(equation 1)
and x + 2y = 6 ........(equation 2)
Multiplying both side of equation 1 with 2, we get
14x - 2y = 14 ........(equation 3)
Add equation 2 and 3.
x + 2y + 14x - 2y = 6 + 14
15x = 20
x = 4/3
x = 1(1/3)
Substitute the value of x in equation 1.
4/3 + 2y = 6
2y = 6 - 4/3
2y = 14/3
y = 7/3
or y = 2(1/3)
Therefore, the values for variables x and y are calculated as:
x = 1(1/3) and y = 2(1/3).
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Write a simplified expression for the area of the rectangle below.
The simplified expression for the area of the given rectangle is 12x + 40
As per the given figure:
The length of the rectangle given in the question: 3/5x + 2
The breadth of the rectangle given in the question: 20
The formula for the area of a rectangle is given by:
Area of rectangle = Length of the rectangle * Breadth of the rectangle
Area of rectangle = (3/5x +2)*20
=(3x + 10)/5 * 20
= (3x + 10) * 4
= 12x + 40
Area of rectangle = 12x + 40
So, the simplified expression for the area of the rectangle with the given length and breadth is 12x + 40
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Triangle HIJ, with vertices H(-9,-8), I(-5,-5), and J(-7,-3), is drawn on the
coordinate grid below.
what is the area, in square units, of triangle HIJ?
The area of triangle HIJ is 7 square units.
Given that, the vertices of triangle HIJ are H(-9,-8), I(-5,-5), and J(-7,-3) respectively. By using the vertices of triangle HIJ we have to evaluate its area in square units. So, let's procced to solve the question.
Area of ΔHIJ = 1/2|x₁(y₂-y₃)+x₂(y₃-y₁)+x₃(y₁-y₂)|
So, x₁ = -9, x₂ = -5, x₃ = -7 and y₁ = -8, y₂ = -5, y₃ = -3
Put all the listed values in the formula of area of triangle HIJ.
By using the above formula, we get
=1/2|-9(-5+3)+(-5)(-3+8)+(-7)(-8-(-5))|
=1/2|-9(-2)-5(5)+(-7)(-3)|
=1/2|18-25+21|
=1/2|14|
= 1/2 x 14
= 7
Therefore, the area of triangle HIJ is 7 square units.
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The circle graph shows the most important problems for
the 14,054,077 high school teenagers in a country..
Without using a calculator, estimate the number of high
school teenagers for whom doing well in school is the
most important problem.
Most Important Problems for High School Teenagers
Doing Wel in School, 12%
Social Pressures and Fitting in, 22%
Drugs, 22%
Others, 29%
Getting along with Parents. 2%
Geting into College, 2%
Sexual Issues, 2%
Crime and Violence in School, 9%
Doing well in school is the most important problem for approximately how many of the high school teenagers?
OA. 4,200,000
OB. 1,400,000
LOC. 2,800,000
OD. 5,600,000
According to the circle graph, doing well in school is a problem that affects B. 1,400,000 high school teenagers.
Which high school students are affected?The circle graph shows that 12% of high school students have the problem of doing well in school.
In actual numbers, this is:
= 12% x number of high school teenagers
Solving gives:
= 12% x 14,054,077
= 1,686,489 students
= 1,400,000 approximate
In conclusion, option B is correct.
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EVALUATING EXPI
Evaluate the expression below
when g = 10
6g²
Answer:
600Step-by-step explanation:
Expression given:
6g²Find its value when g = 10:
6g² = 6(10²) = 6(100) = 600lillian drew a scale drawing of a county park. the scale she used was 1 inch : 4 yards. the picnic area is 80 yards wide in real life. how wide is the picnic area in the drawing?
The picnic area is 20 inches wide in the drawing in her scale of 1 inch : 4 yards.
What is unitary method ?Unitary method is a technique for first solving the value of a single digit unit and from there we can find the value of any given unit.
According to the given question lillian drew a scale drawing of a county park. the scale she used was 1 inch : 4 yards.
The picnic area is 80 yards wide in real life.
∴ The width of the picnic area in here drawing in inches will be
= 80/4 inches.
= 20 inches.
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Given the quadrilateral with the following vertices a(-2,3) b(-2,6) c(-6,-1) and d (-6,2). is the quadrilateral a parallelogram?
The quadrilateral is a parallelogram.
Properties of parallelogram,
a>The opposite sides of the parallelogram are equal and parallel.
b>parallel lines have an equal slope.
Let now find the length of the opposite side of the parallelogram
To find the length we have ,
[tex]\sqrt{(x_{2} ^{2} -x_{1} ^{2} ) +(y_{2} ^{2}-y_{1} ^{2} )}[/tex]
(-2, 3) , (-2, 6)
Slope = 6-3/ -2+2 = infinity
Length L1 = [tex]\sqrt{(-2 + 2)^{2} + (6 - 3)^{2} }[/tex]
= 9
(-6, -1), (-6, 2)
Slope = 2+1/ -6 + 6 = infinity
Length L2 = [tex]\sqrt{(-6 + 6)^{2} + ( 2 + 1)^{2} }[/tex]
= 9
Therefore the given vertices are of a parallelogram, as the length and slope are equal.
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Test each number with substitution to see which one is the correct solution for the equation.
Is -0.5, 0.5 or 4.5 the correct solution for the equation -6x+15=-12
the correct solution for the equation is 4.5
A bird flies from the bottom of a canyon that is 51 3/10 feet below sea level to a nest that is 737 1/10 feet above sea level.
685.8 feet
Sea level is a reference to elevation of the ocean or land interface called the shoreline.
Land that is above this elevation is higher than sea level and lower is below sea level.
The bottom of the canon is at 51 3/10 below the sea level which is also written as -51 3/10 ……(1)
The nest is at 737 1/10 feet above the sea level so it is expressed as
737 1/10 ….(2)
To find the distance between the bottom of the canyon and the bird’s nest we subtract (2) from (1)
737.1 – 51.3
= 685.8 feet
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What is the equation of a line that has slope of -4/3 and passes through the point (12,-4)
Answer:
y = -4/3x + 12
Step-by-step explanation:
y - y1 = m (x - x1)
the y1 and x1 are where your coordinates go. The m is the slope.
So now we just plug it in.
y - (-4) = -4/3 (x - 12)
we can clean it up some more to make it into the y = mx + b format.
y + 4 = -4/3x - (-4/3)12
y + 4 = -4/3x + 16
y = -4/3x + 12
simplify the following expression:
3 - x (4 + x) if x = 2
Answer:
Step-by-step explanation: We can plug 2 into the equation for x:
3 - 2(4 + 2)
Now let's distribute:
3 - 8 - 4
Now we can solve:
3 - 8 = -5
-5 - 4 = -9
Final answer: 3 - x(4 + x) = -9
Help me with this please , picture above
Lenny makes 55,000 per year and gets annual raises of 20,000 how many years why will it take lenny and kenny to make the same annual salary
Answer:
14,987
Step-by-step explanation:
Can someone help me with the radius? please and thank you
Answer:
r=7cm
Step-by-step explanation:
the diameter (distance from one side of the circle to the opposite side) is given in the picture. the radius is 1/2 the diameter, so r=7cm
*i'm assuming the 14cm given is referring to the straight line in the circle and not the circumference
Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. if they toll together at 11:00, at what time will they toll together again?
If Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10, and 12 seconds respectively and toll together at 11:00, then they will toll together again at 11:02.
Least common multiple abbreviated as LCM is used to determine the time at which the six bells will toll together again.
The least common multiple of two or more numbers is the smallest number that is a multiple of those numbers.
The least common multiple of 2, 4, 6, 8, 10, and 12 can be found by prime factorization.
Prime factorization of :
2 = 2^1
4 = 2 x 2 = 2^2
6 = 2 x 3
8 = 2^3
10 = 2 x 5
12 = 2 x 2 x 3 = 2^2 x 3
The least common multiple can be calculated by the multiplication of the prime factors raised to their highest power.
Therefore,
LCM = (2^3) (3) (5) = 120
Hence the bells will toll together again after 120 seconds
As 120 seconds = 2 minutes
Therefore, the time at which they will toll together again is calculated to be 11:02.
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Please help me someone
Answer:
See the table below
For n, the answer is 2n+1
Step-by-step explanation:
The number of trees in each figure represents an arithmetic sequence where the difference between subsequent figures is 2 (caled the common difference)
So the sequence is
Figure(n) Number of Trees
1 3
2 5
3 7
4 9 (7+2)
5 11 (9+2)
n 2n + 1
In general, for any arithmetic sequence we can write an equation for the nth term as [tex]a_n = a_0 + d(n-1)[/tex] where [tex]a_0[/tex] is the first term and d is the common difference
So for this example, we have [tex]a_0 = 3[/tex] and d=2 giving
[tex]a_n = 3 + 2(n-1) = 3 + 2n -2 = 2n + 1[/tex]
This is