It says what is the area, in square units, of triangle QRS? I need help

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

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!

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18