One book costs £2.98. how much do 4 books cost?

What is the value of x in the following equation. -x ^3/2 = -27

X2 + y 2 = 36 x + y = 6 solve the system of equations.

Jude is making cement for a driveway. the instructions show the amount of each ingredient to make 1 batch of cement. complete each statement to adjust the ingredients for each new situation if jude uses these instructions.