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Art [367]
3 years ago
10

Please help me in number 3please!

Mathematics
1 answer:
satela [25.4K]3 years ago
4 0

For the circumference, you actually multiply by 20 because of the formula πd = C [OR 2πr = C]. You meant to double the radius.

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Alexeev081 [22]
Multiply it all together
7 0
3 years ago
Write a real-world problem that is solved by an equation and then solve (show work).
ololo11 [35]
A company is selling books. It has to pay $500 to start printing the books, and once they have done that, the books sell at $14.99 each. How many books must they sell to make a profit?

First we would model an equation. X will be the amount of books sold, and Y will be profits (in dollars obv). They had to pay $500 before they could start selling, so we must account for that too.

This equation would be y=14.99x-500 because for every book sold, X increases by 1, increasing Y by 14.99

The answer would be 34 books sold in order to turn a profit. (500/14.99=
6 0
3 years ago
The mean of six test scores is 83.what is the sum of the six test scores?
Fittoniya [83]
Mean = total score : frequency
mean x frequency = total score

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6 0
3 years ago
Find the missing variables for each triangle...
kati45 [8]

Triangle A:

y = 57.5°

x = 57.5°

Triangle B:

y = 5

x = 6.5

Triangle C:

... I apologize but I do not know what Triangle C is. Sorry!!

Triangle D:

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5 0
3 years ago
This system of equations has an infinite number of solutions. Define the solutions algebraically, and allow z to represent all r
Soloha48 [4]

Answer:

x = 12z + 1  and y = 10z - 1

Step-by-step explanation:

To solve the system of equations, we can use the substitution method

If we call

3x - 4y + 4z = 7 I

x - y - 2z = 2 II

2x - 3y + 6z = 5 III

Clearing II  x = 2 + y + 2z

Now, replacing II in III

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10z - y = 1 from here y = 10z - 1

Finally, replacing y in I

3x - 4(10z - 1) + 4z = 7

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3x - 36z = 3

3x = 36z + 3

x = 12z + 1

Done

7 0
3 years ago
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