1 answer:
1.) m + n = 5 m - 3 = n m + m - 3 = 5 2m - 3 = 5 2m = 8 m = 4 m + n = 5 4 + n = 5 n = 1 Therefore m =4 and n =1 2.) I don't think this one can be done because: 6x - 2(3x - 7) = 12 6x - 6x + 14 = 12 0x + 14 = 12 0x = - 2 3.) 5x + 2(x + 7) = 7 5x + 2x + 14 = 7 7x + 14 = 7 7x = - 7 x = - 1 y = x + 7 y = - 1 +7 y = 6 Therefore x = - 1 and y = 6 4.) I don't think this one can be done either because: 14 - 4x = 2y Is the same as: 7 - 2x = y Which is the same as the first equation. You then get 0x because if you substitute y in: 7 - 2x + 2x =7 7 = 7 5.) y = 4x + 6 5x - 4x + 6 = 6 x +6 = 6 x = 0 y = 4x + 6 y = (4x0) + 6 y = 6 Therefore x = 0 and y = 6
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Answer:
314 cm ^ 2
Step-by-step explanation:
First do, 3.14 x 20 ^ 2
3.14 x 20 ^ 2 = 1,256
Then do, 1,256/4
1,256/4 = 314
Why 4?
This part of the circle is 1/4 of the entire circle.
What does ^ mean?
It's just a way to say to the power of on a computer.
Hope this helps! :)
Answer:
y =20
Step-by-step explanation:
you have to get the y by itself so what you do on one side you do to the other. subtract 12 on both sides and you get y=20
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