What is the value of the function Y equals 2X plus 3 When x equals -1

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.