Iso confused number 10 is my set up right? idk

Close, but not quite right.

If you let x represent the measure of angle C, then, as you have, the measure of angle B is 3x+2.

The sum of angles B and C is 90, so the setup is ...

... (3x+2) +(x) = 90

... 4x = 88 . . . . . . . . . . collect terms, subtract 2

... x = 22 = m∠C

... 3x+2 = 68 = m∠B

more detail

step-by-step explanation:

f(x) is   are being squared

g(x) is   increasing by 2

h(x) is adding .25 each time

k(x) is taking the square root

f(x) and k(x) are exponential functions