What do mathematicians do after a snowstorm

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36