Solve for x. Enter the solutions from least to greatest. x^2-x -90= 0
lesser x =
greater x =

Three times the sum of a number and seven is negative thirty-six. what is the number?

Emily is entering a bicycle race for charity. her mother pledges $0.90 for every 0.75 mile she bikes. if emily bikes 18 miles, how much will her mother donate?

The area of a circle is equal to 1 dm². find the radius of the circle.