In angle abc, b is 13 more than the a, c is 9 less then twice the measure of a, find measure of abc

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations