Aused bookstore will trade 2 of its books for 3 of yours if val brings in 18 books to trade how many books can she get from the store

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

What is the expression in factored form? 225x^2 - 144 a. 9(5x+4)^2 b. 9(5x-4)^2 c. 9(4x+5)(4x-5) d. 9(5x+4)(5x-4)