Answer:
C. 
Step-by-step explanation:
{y = ¼x - 3}
{2x + 4y = 12
2x + 4[¼x - 3] = 12
2x + x - 12 = 12
3x - 12 = 12
+ 12 + 12
_________
3x = 24
__ __
3 3
[Plug this back into both equations above to get the y-coordinate of −1]; 
I am joyous to assist you anytime.
Is 121.25 because 485 divided by 4 is 121.25
Remember to do PEMDAS so your answer is not correct, since you multiplied before doing the parentheses/exponents.
Explanation:
3(3)^2- 5(4)
= 3(9) - 5(4)
= 27 - 20 = 7
1/3 for one total wall. So multiplied by four is 4/3 total gallons
Answer:
x = 57 y = 137
Step-by-step explanation:
x + 43 + 90 = 180
x + 43 + 90 - 90 = 180 - 90
x + 43 = 90
x + 43 - 43 = 90 - 43
x = 57
43 + y = 180
43 + y - 43 = 180 - 43
y = 137
