Function would be f(x) = 5x+85
here, x= 15
5(15)+85 = 75+85 = $160
I'm not sure if you use "x" as your variable, so:
# + 5 = 3 or x + 5 = 3
The prime factorization is 3 x 3 x 5 x 13
4x - y = 10, y = 2x - 2
4x - (2x -2) = 10
4x - 2x + 2 = 10
2x = 8
x = 4
4(4) - y = 10
-y = -6
y = 6
So x = 4 y= 6
Hope this helps!
Brainliest and a like is much appreciated!