Which expressions are equivalent to 3x + 2(x − 1) − 4?

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.

Adesigner charges a one time fee of $200 plus $40 an hour for each project. write an expression to represent how much money the designer will make for a project

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.