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krok68 [10]
3 years ago
9

There were 1125 books sold last week at Sid's Bookstore. The circle graph below summarizes these books by genre.

Mathematics
1 answer:
s2008m [1.1K]3 years ago
7 0

Answer:

Number of self-Help books sold = 252 books

Step-by-step explanation:

Total books sold last week = 1,125

Central angle for the Self-Help slice = 80.64°

Total angle in a circle = 360°

How many of the books sold were Self-Help books?

Number of self-Help books sold =

Central angle for the Self-Help slice / Total angle in a circle × total number of books sold

= 80.64° / 360° × 1,125

= 0.224 × 1,125

= 252

Number of self-Help books sold = 252 books

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spin [16.1K]
The other endpoint is (1, -17).

The midpoint formula is:

m=(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2})

Using our midpoint and endpoint, we have:
(6, -11) = (\frac{11+x_2}{2}, \frac{-5+y_2}{2})
\\
\\6=\frac{11+x_2}{2} \text{ and } -11=\frac{-5+y_2}{2}


For the first equation (to find the x-coordinate) we will multiply both sides by 2:
6\times2=\frac{11+x_2}{2}\times 2
\\
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Subtract 11 from both sides:
12 - 11 = 11+x₂ - 11
1 = x₂

For the second equation (the y-coordinate) we multiply both sides by 2:
-11\times2=\frac{-5+y_2}{2}\times 2
\\
\\-22=-5+y_2

Add 5 to both sides:
-22+5 = -5+y₂ + 5
-17 = y₂

This means that (x₂, y₂) is at (1, -17).
4 0
3 years ago
Write the slope intercept form of a line containing the y - intercept (0, -3) with a slope of –1.
drek231 [11]

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Step-by-step explanation:

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3 years ago
6x+5y+2z=41<br> 4x-10z=-10<br> -x-2y+2z=-1
ikadub [295]
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tankabanditka [31]

Answer:

x > 22

Step-by-step explanation:

<em>Hey there!</em>

Well to solve,

52 - 3x < -14

we need to single out  x

52 - 3x < -14

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7 0
3 years ago
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2. Kelsea needs a test average of at least 90 to get an "A-" this marking period in math. Her three test grades
Luda [366]

Answer:

<u>Equation:  87 + 91 + 86 + x = 360</u>

<u>Solution: 264 + x = 360</u>

<u>x = 360 - 264</u>

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Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

First three Kelsea's test grades : 87, 91 and 86

2. What score must she get on her fourth test to receive at least an A- ?

Define variable:  x that represents the grade needed by Kelsea on her fourth test to receive at least an A-

Equation:  87 + 91 + 86 + x = 360

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<u>Now you can understand if the previous work you did is correct</u>

6 0
3 years ago
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