i need help 9th grade math

Answer:

-------------------

Step-by-step explanation:

as I see it, A is the full 180° angle.

and so, there are 3 more 180° angles:

below A in the other side of the blue line the whole 180° arc.

above and below the blue line at the intersection point with the second, parallel red line (again, the whole 180° arcs).

Answer:

[tex]\frac{3}{4}[/tex]

Step-by-step explanation:

[tex]\frac{3}{5} = \frac{36}{x}[/tex]

3x = 36 x 5

3x = 180

x = 60

Michael has 60 marbles.

Nick recieves 9 more marbles so he has 36 + 9 = 45 marbles

The new ratio will be:

[tex]\frac{45}{60}[/tex]  = [tex]\frac{3}{4}[/tex]

Answer:

$7.30

Step-by-step explanation:

All you have to do is 9 x 5= 45

Then 45 - 37.70= 7.30

HGD

-ghost

Tristan would have paid $7.3 more, if he had purchased the books online.

The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.

Given that, Tristan paid $37.70 for 5 books by his favorite author.

Each book would have cost $9 if he had purchased it online instead.

Total money paid to purchase books online = 5×9

= $45

Difference in cost = 45-37.70

= $7.3

Therefore, Tristan would have paid $7.3 more, if he had purchased the books online.

To learn more about the unitary method visit:

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Answer:

x = -3

y = 2

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

Point Form:

(-3,2)

Equation Form:

x = -3, y = 2

Answer:

3 faces

A cylinder has 3 faces - 2 circle ones and a rectangle (if you take the top and bottom off a tin can then cut the cylinder part on the seam and flatten it out you would get a rectangle). It has 2 edges and no vertices (no corners).

Step-by-step explanation:

[tex] \huge\fbox\blue{ANSWER} [/tex]

A cylinder has 3 faces - 2 circle ones and a rectangle

Answer:65

Step-by-step explanation:

Hi

It’s 65 bc 35+80= 115. And triangles are 180° so 115-180= 65.

Hope it helped

Answer:

65

Step-by-step explanation:

The value of 35 degrees can be translated from the opposite diagonal. Adding the 80 degrees and 35 degrees equals 115 degrees. Finally find the remainder 180-115= 65

Answer:

$24.42

Step-by-step explanation:

3.14*r^2= area

3.14*1.2^2=4.52

5.40*4.52=24.42

Answer:

Step-by-step explanation:

Remark

First find the area of the circular piece of fabric. Then deal with cost per square foot.

Area of the fabric

Area =  pi * r^2

Area = 3.14 * 1.2^2

Area = 3.14 * 1.44

Area = 4.5216 square feet

Cost

1 square foot costs 5.40 dollars

4.5216 square feet costs x                   Cross multiply

x = 5.40 * 4.5216

Answerx = 24.42 dollars for the fabric bought.

Answer:

false

Step-by-step explanation:

Answer:

Circumference = 23.23600 (using 3.14 instead of whole PI)

Step-by-step explanation:

0.18

Percentages and decimals are closely related. As a matter of fact, we don't need to use any actual math to solve this question because there is a shortcut.

Answer by Dividing

One way to solve the question is by dividing. Percentages are numbers that represent a portion of 100. So, to find the decimal form we can divide the percentage by 100.

Shortcut

While dividing by 100 can work, there is an easier way to find the decimal form. Dividing by 100 will always be equivalent to moving the decimal point 2 digits to the left.

The function in vertex form is equivalent to [tex]\rm y = (x + 2/4)^2 + \frac{3}{4}[/tex].

A quadratic equation is an equation of degree 2 in other words.Quadratic equations have the form ax² + bx + c = 0 and are second-degree algebraic expressions.

The standard quadratic function with vertex (h, k) is ;

[tex]\rm y = a(x - h)^2 + k[/tex]

The general quadratic equation is found as;

[tex]\rm y = ax^2 + bx + c[/tex]

The value of h is given as;

[tex]\rm h = \frac{-b}{2a}[/tex]

For the given equation in the problem;

[tex]\rm y = x^2 + x + 1[/tex]

The value of the k is found by;

[tex]\rm y =( \frac{-1}{2}) ^2 - \frac{1}{2} + 1 \\\\ y= \frac{1}{4} - \frac{1}{2}+ 1 \\\\ y= \frac{1}{4}- \frac{2}{4}+ \frac{4}{4}\\\\ y= \frac{3}{4}[/tex]

So the vertex is at [tex]\frac{-2}{4}[/tex] and [tex]\frac{1}{4}[/tex]  then the vertex form is:

[tex]y = (x +\frac{2}{4} )^2 + \frac{3}{4}[/tex]

Hence the functions in vertex form are equivalent [tex]\rm y = (x + 2/4)^2 + \frac{3}{4}[/tex].

To learn more about the quadratic functions refer to the link;

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Answer: OPTION 3

Step-by-step explanation:

Step-by-step explanation:

since the equation is v = 1.225 × sqrt(a)

we can plug in the known values to find the altitude.

so:

(67.1/1.225)^2 = a

a = 3000

Base on the visibility formula v = 1.225√a, the altitude at which Dereck is hang gliding is 7.4 miles

The visibility formula is given as follows:

v = 1.225√a

where

Therefore,

v = 67.1 miles

v = 1.225√a

67.1 = 1.225√a

divide both sides by 1.225

√a = 67.1 / 1.225

√a = 54.7755102041

square both sides

√a² = √54.7755102041

a = 7.40104789878

a = 7.4 miles

learn more on visibility here: https://brainly.com/question/16166215

Answer:

The mean of the data is 3 inches, is false

Step-by-step explanation:

3, 3, 4, 4, and 6 inches.

To find the mean, add the numbers together and divide by the number of data points

( 3+3+4+4+6)/5 = 20/5 = 4

The median is the middle number

3, 3,    4,      4, and 6 inches.

The median is 4

The range is the largest number minus the smallest number

6-3 =3

The second statement is true. It is a reduction because 0 < n < 1.

Dilation means changing the size of an object without changing its shape. The size of the object may be increased or decreased based on the scale factor.

Given: A triangle is dilated by a scale factor of n = 1/3. As n is less than 1 but greater than 0.

A dilation is a rigid transformation that forms an image that is the same shape as of the original figure but with a different size.  A dilation transforms a figure by scalar factor 'n' about the center of dilation is a fixed point in the plane which never changes.

A dilation that forms a larger image is known as enlargement.  A dilation that forms a smaller image is known as reduction.

• If n is greater than 1, then the image is an enlargement.

• If n is between 0 and 1, then the image is a reduction.

• If n is 1, the figure and then the image is exactly the same.

Hence the second statement is true. It is a reduction because 0 < n < 1.

To know more about Dilation follow

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Answer:

I'm not positive but it should be 16/625

Step-by-step explanation:

if it is brainlist would be nice

Using the binomial distribution, it is found that the expected score of the game is of 21.

It is the probability of exactly x successes on n repeated trials, with p probability of a success on each trial.

The expected number of trials until q successes is:

[tex]E_s(X) = \frac{q}{p}[/tex]

In this problem, a die has a p = 1/6 probability of resulting in a 1, hence the expected number of trials is:

[tex]E_s(X) = \frac{1}{\frac{1}{6}} = 6[/tex]

In each trial, each outcome from 1 to 6 is equally as likely, hence the expected score of a single trial is given by:

[tex]E = \frac{1 + 6}{2} = 3.5[/tex]

Then, the expected score of the six trials is:

6 x 3.5 = 21.

More can be learned about the binomial distribution at https://brainly.com/question/24863377

Answer:

D

Step-by-step explanation:

Each box represents one observation.The data table is 7 boxes by 3 boxes.    7 * 3 is 21, so the answer is D.

Hope this helps :)

Have a nice day!

Answer: look at the attached image

Step-by-step explanation:

two pipes= $1.20

Selling price of the first pipe = $1.20

Profit = 20%

Let’s try to find the cost price of the first pipe

CP = Selling price - Profit

CP = 1.20 - 20% of CP

CP = 1.20 - 0.20CP

CP + 0.20CP = 1.20

1.20CP = 1.20

CP = 1.20/1.20

CP = $ 1

Selling price of the Second pipe = $1.20

Loss = 20%

Let’s try to find the cost price of the second pipe

CP = Selling price + Loss

CP = 1.20 + 20% of CP

CP = 1.20 + 0.20CP

CP - 0.20CP = 1.20

0.80CP = 1.20

CP = 1.20/0.80

CP = $1.50

Therefore, total cost price of the two pipes

= $1.00 + $1.50

= $2.50

And total selling price of the two pipes

= $1.20 + $1.20

= $2.40

Loss = $2.50 – $2.40 = $0.10

Therefore, Mr. Jones loss 10 cents.

answer= option d.

Answer:

the slope u find by looking for where the line hits an exact + and the y-int is where the line touches the y-axis

Answer:

6

Step-by-step explanation:

24/4 = 6

30/5 = 6

Dividing the values of the larger print by the corresponding values of the smaller print results in a scale factor of 6

Answer:

234mm

Step-by-step explanation: