Question

I need help!!!
1.f(7) if f(x) = 5x
2.f(9) if f(x) = x + 13
3.f(4) if f(x) = 3x - 1

Answer 1

1. 35

2. 22

3. 11

I went on matway and just looked up the answers

Answer 2

1. 35
2. 22
3. 11
you replace the x with the given number so like it’s say f(7) well the 7 is where the x supposed to go so you plug in 7 for the x and multiply it by 5