The total cost is given by
2.5x + 0.5f, where x represents the amount of excellent-condition paperbacks and f is is the amount of fair-condition paperbacks.
Answer:
The first step would be to multiply 2x - 1 by 6, which would be 12x - 6 .
0.5 / 10 = 0.05
take the product and divide it by one of the numbers you multiplied by and it will give you the other number you originally multiplied
(f∘g)(3) = f(g(3))
Find g(3) by substituting x=3 in g(x)
g(x)=x²-1
g(3)=3²-1
g(3)=9-1
g(3)=8
f*g(3) = f(g(3)) = f(8)
find f(8) by substituting x=8 in f(x):
f(x)=2x+3
f(8)=2(8)+3
f(8)=16+3
f(8)=19
So f∘g(3) = 19
Sorry I am wrong
