Answer:
1 and 3
Step-by-step explanation:
The angles opposite each other when two lines cross. They are always equal. "Vertical" refers to the vertex (where they cross), NOT up/down.
f(3) = 71
f(x) = 10(x + 5) − 9
f(3) = 10(3 + 5) - 9
f(3) = 10(8) - 9
f(3) = 80 - 9
Option A is the correct answer
C. 3x + 2y = 5 and 2y = 6 - 3x & D. 3x = 2 − 4y and 4y = 7 − 3x , have no solution! (:
