Substitute y=4x to the second equation:
x^2 + (4x)^2 = 17
x^2 + 16x^2 = 17
17x^2 = 17
x^2 = 17/17
x^2 = 1
x = 1 and -1
When x=1, y=4(1) = 4
When x=-1, y=4(-1) = -4
Thus the solutions would be (1,4) and (-1,-4). That would correspond to D. and A.
Answer:
36yd
Step-by-step explanation:
width = x
2x - 3 = 75
2x = 78
x = 36yd
width = 36yd
The answer is C. 4 inches by 8 inches
Answer:
8.64
Step-by-step explanation:
12% = 0.12
72(0.12) = 8.64
C. You'd be starting at a higher floor (positive number) and descending floors (negative number per x). If you assume x is time it's a little more logical and visual.
