Evaluate the expression for the given value of the variuble with step by step explanation -4b-8 + -1-b^2 +2b^3 b=-2

The area of a rectangle is 15+5y square feet. which of the following expressions could be the length of the sides of the rectangle, in feet a. 5 and 3y b. 5 and 3+y c. 5 and 5+y d. 3 and 5+3y

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Julie buys 2kg of apples and 7kg of pears ? 12.70. the pears cost ? 1.30 per kilogram what is the price per kilogram of the apples? show your working out