Question

F(x) = 9x+7

find 20-3)
09c + 7
0 18c + 20
18c + 7
O -
180 - 20

Someone help?

Answer 1

18c - 20

Explanation:

substitute 2c - 3 into x,

f(2c - 3) = 9(2c - 3) + 7

=> f(2c - 3) = 18c - 27 + 7

=> f(2c - 3) = 18c - 20