Congruent triangles Unit 4 homework 4 page 2 final page thank you to who ever helps me

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

The moats separating people from the animals are 5 m wide for lions and 4 m wide for the elephants. if the lion’s moat is 4 m deep, how deep should the elephants’ moat be?

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )