What whole number can go in 30 and not 15

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

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Scenario: a rectangular plot of ground is 5 meters longer than it is wide. its area is 20,000 square meters. question: what equation will you find the dimensions? note: let w represent the width. options: w(w+5)=20,000 w^2=20,000+5 (w(w+5))/2=20,000 w+2(w+5)=20,000