Ian bought four books that cost $4.95, $3.95, $2.00, and $0.99. All book prices include sales tax. Ian gave the cashier his money and received $3.11 back in change. How much money did Ian give the cashier?

Evaluate the expression. (9 + 5)(3 + 2)0

Can someone tell me if this is perpendicular? !

Simonne used the following steps to simplify the given expression. 12-3(-2x+4) step 1: 12+(-)+(-3)(4) step 2: 12+6x+(-12) step 3: 12+(-12)+6x step 4: 0+6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? •identity property of addition •inverse property of addition •associative property of addition •commutative property of addition