What is the area of a triangle that has a height of 4feet and a base length of 9 feet

Y=4x^2+x-1 solve using quadratic formula

Is a positive integer raised to a negative power always positive

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers