Diagonal of a rectangle Pythagorean theorem

Find the missing factor. 7s2 + 25s + 12 = (s + 3)( ).

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.