You have 20 quarters. You find 40% more in your room. Then you go to the store and spend 50% of them. How much money do you have left?

The pyramid shown has a square base that is 24 centimeters on each side. the slant height is 16 centimeters. what is the lateral surface area?

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin.how many doctors use brand x aspirin

X+y=-4 x-y=2 use elimination with adding and subtraction