Yoko received a $80 gift card for a coffee store. she used it in buying some coffee that cost $8.17 per pound. after buying the coffee, she had $47.32 left on her card. how many pounds of coffee did she buy?

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²

Griffin ordered a pair of sneakers online. he had a $22 credit that he applied toward the purchase, and then he used a credit card to pay for the rest of the cost. if the shoes cost $58, how much did griffin charge to his credit card when he bought the sneakers?