Practice problem
Let f(x)=3x+5f(x) = 3x + 5f(x)=3x+5 and g(x)=7x+3g(x) = 7x + 3g(x)=7x+3. What is (f+g)(x)(f+g)(x)(f+g)(x)?
18x18x18x
8x+108x + 108x+10
10x+810x + 810x+8
21x+1521x + 1521x+15
15x+2115x + 2115x+21
Type a concept, like “slope” or “photosynthesis”.