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murzikaleks [220]
2 years ago
12

PLSSSSS HELPPPPP MEEEE!!!!!

Mathematics
1 answer:
Oliga [24]2 years ago
7 0

Answer:

50.24

Step-by-step explanation:

area of a circle = pi r^2

substitute 3.14 for pi

3.14*(8/2)^2

3.14*4^2

3.14*16

50.24

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Grade 7 Need help with proportions (PICTURE INCLUDED)
jeka57 [31]
What you are doing with proportions most the time is solving for a variable which in this example I will use an x. You have to do something called cross multiplying. now look at number 21. when you cross multiply you multiply the number of the top part of the fraction on the left side to the bottom part of the fraction on the right side. In that example 1 × 36 = 36. now write 36 = 16x since you have to cross multiply the other parts of the fraction. Then you would divide both sides of the equation by 16. I will make a mixed fraction for this example. 2 4/16 which simplified equals 2 1/4
4 0
3 years ago
Graph linear equation y = x divided by 3
gizmo_the_mogwai [7]

Answer:

1/3

Step-by-step explanation:

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I used desmos.

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3 years ago
Write down first five multiples of 7.
vitfil [10]

Answer:

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Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Solve the system of equations. -4x+7y = 20 & y=3x+15
andreyandreev [35.5K]

Substitute y = 3x + 15 to the equation -4x + 7y = 20:

-4x + 7(3x + 15) = 20          <em>use distributive property</em>

-4x + (7)(3x) + (7)(15) = 20

-4x + 21x + 105 = 20     <em>subtract 105 from both sides</em>

17x = -85     <em>divide both sides by 17</em>

x = -5

Substitute the value of x to the equation y = 3x + 15:

y = 3(-5) + 15

y = -15 + 15

y = 0

<h3>Answer: x = -5 and y = 0</h3>
7 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20%5Csqrt%5B3%5D%7B%20-%20125%7D%20%20" id="TexFormula1" title=" \sqrt[3]{ - 125} " alt=" \s
loris [4]
The answer to your question is 11,000
6 0
3 years ago
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