The answer is C. 1
You can just plug in the different answers for x and see which one equals zero.
F(1) = 1 + 4 + 1 - 6 = 0
15-7 is 8! so 8 is the length of the side with the ?
-3x + 4y = 12
x - y = 1....x = y + 1
-3(y + 1) + 4y = 12
-3y - 3 + 4y = 12
-3y + 4y = 12 + 3
y = 15
x - y = 1
x - 15 = 1
x = 1 + 15
x = 16
one solution (16,15)
2.12=2.120 that is the answer
You may solve this ratio by cross multiplying. To do this, you multiply the numbers diagonally across from each other.
x/10 = 1/5
10(1) = x(5)
10 = 5x
2 = x
Answer:
x = 2
