In problems 15-18, solve the heat flow problem (1)3 with ? = 3, l = ? , and the given function f(x 15. f(x) = sin x-6 sin 4x 16. f(x) = sin 3x + 5 sin 7x-2 sin 13x 7. f(x) sin x 7 sin 3x sin 5x 18. f(x) = sin 4x + 3 sin 6x-sin 10x

5x + 5

step-by-step explanation:

you should always add the diagrams and graphs we cannot see. this particular question is kind of borderline because we can make a graph for you.

(f + g)x = -x^2 +3x + 5 + x^2 + 2x

(f + g)x = 5x + 5

the graph of z = 5x + 5 is shown below. always use desmos when in doubt.

the answer is 40.

proof: