leila received a $90 gift card for a coffee store. she used it in buying some coffee that cost $8.51 per pound. after buying the coffee, she had $64.47 left on her card. how many pounds of coffee did she buy?

I’m stuck on this equation, anyone got the answer?

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?