Greg needs to practice his clarinet for 40 minutes per day. He already practiced 30% of the total time needed. How many more minutes does he need to practice?

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny