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2 years ago

Find 80 percent of 25

Mathematics

1 answer:

Elden [556K]2 years ago

3 0

Use 80% *25 than you can get 20.

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What is the formula for the sum of the interior angles of a polygon

andrey2020 [161]

Answer:

Sum of the interior angles = (n-2) x 180°

where

n is the number of sides of the polygon

Step-by-step explanation:

The formula for the sum of the interior angles of a polygon is:

$sum=(n-2)*180$

where

$sum$ is the sum of the interior angle of the polygon

$n$ is the number of polygons

Let's check the formula using an example:

We want to find the sum of the interior angles of a square, we know that a square has 4 sides, so $n=4$ .

Replacing values

$sum=(4-2)*180$

$sum=(2)*180$

$sum=360$

We can apply the same procedure to any convex polygon with n sides.

7 0

3 years ago

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What is the sum of the arithmetic series 5<br> E(3n-2)<br> N-1

vitfil [10]

Answer:

Step-by-step explanation:

4 0

2 years ago

The table shows the height of a plant as it grows. Which equation in point slope form gives the plant’s height at any time

vodka [1.7K]

Answer:

Option A is correct.

$y-16=8(x-2)$ is the equation represent the point slope form gives the plant's height at any time.

Step-by-step explanation:

Point slope intercept form: For any two points $(x_1, y_1)$ and $(x_2, y_2)$ then,

the general form

$y-y_1=m(x-x_1)$ for linear equations; where m is the slope given by:

$m =\frac{y_2-y_1}{x_2-x_1}$

Consider any two points from the table;

let A= (2 , 16) and B =(4, 32)

First calculate the slope of the line AB:

$m =\frac{y_2-y_1}{x_2-x_1}=\frac{32-16}{4-2}=\frac{16}{2}$ = 8

Therefore, slope of the line m = 8

Then,

the equation of line is:

$y-y_1=m(x-x_1)$

Substitute the value of m=8 and (2, 16) above we get;

$y-16=8(x-2)$

Therefore, the equation in point slope form which gives the plant's height at any time is; $y-16=8(x-2)$ , where x is the time(months) and y is the plant height (cm)

5 0

3 years ago

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Find x and Y pls help

lisabon 2012 [21]

Answer:

Step-by-step explanation:

Comment

The angle supplementary to x and 3x are equal.

Supplementary angles = 180

Solution

x + 3x = 180

4x = 180 Divide by 4

4x/4 = 180/4

x = 45

The angle supplementary to x is 3x

3x = 3*45

3x = 135

This angle is vertically opposite y. Vertically opposite angles are equal. So y = 135

Answer

x = 45

y = 135

3 0

1 year ago

A chef uses 5 pounds of flour to bake 120 blueberry muffins.

azamat

B.
You have to find how much blueberry muffins you could make with one pound of flour.

4 0

3 years ago

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