Answer:
f(-3)= 19
Step-by-step explanation:
you have to use substitution. Every time that you see an x, plug it in for a -3
f(x)= -5x+4
f(-3)= -5(-3)+4
9x+x=110
10x=110
divide 10 on both sides
x=11
11 colored pencils
99 markers
