Answer:
20 +(x+15.5)
Step-by-step explanation:
1/6
3/5= $3000
then 2/5= $1200
f(x)=(2×2)-3x+20
0=4-3x+20
0=-3x+24
3x=24
×=24÷3
x=8
Answer is:
a=4, b=6 c=5