Betty guesses there are 57 marbles in a jar, but there are actually 60. What is the percent error in Betty's guess?​

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y

Acompany wants to reduce the dimensions of its logo by one fourth to use on business cards. if the area of the original logo is 4 square inches, what is the area of the logo that will be used on the business cards?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much