William went to the grocery store and bought 8 lbs of ground beef at a discounted price. he gave the cashier two 20 dollar bills, and she gave him $7.12 in change. what was the price per pound of ground beef?

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

What is the volume of a rectangular prism that is 120 centimeters by 2 meters by 1.5 meters in cubic meters?

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.