Which composition of transformations will create a pair of similar, not congruent triangles?

For each proportion find the unknown number x 1/5/8=×/15

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

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!