Simplified expression of 7z + 8 + 5z – 5z – 9?

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Roger could feed 5 walruses with 4 kilograms of fish. how many walruses could he feed with 7.2 kilograms of fish?

George is putting trim around his rectangular deck, including the gate. he will need 44 feet of trim to do the entire deck. if the deck is 13 feet long, how wide is the deck?