Please help me ( but please explain every step you did )

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

Find the measure of angle y. round your answer to the nearest hundredth. ( type the numerical answer only) a right triangle is shown with one leg measuring 5 and another leg measuring 14. an angle across from the leg measuring 5 is marked y degrees. numerical answers expected!