Answer:
c=d/a-b
Step-by-step explanation:
a(c+b)=d
c+b=d/a
c=d/a-b
If the bike cost $80 and got it with a discount to $60 the answer is 20%
f(x) = x + 4
g(x) = x² - x
a) f(5)
f(5) = 5 + 4 = 9
b) g(-1)
g(-1) = (-1)² -(-1) = 1 + 1 = 2
c) f(x) = 10
10 = x + 4
x = 6
d) g(x) = 6
6 = x² - x
0 = x² - x - 6
0 = (x - 3)(x + 2)
x = 3, -2
