Erica used friendly numbers to find 43-19 she added 1 to 19 and subtracted 1 from 43 what is erica's error

The area of a rectangle is 15+5y square feet. which of the following expressions could be the length of the sides of the rectangle, in feet a. 5 and 3y b. 5 and 3+y c. 5 and 5+y d. 3 and 5+3y

Which answer is the solution set to the inequality |x|< 9? a. x< -9 or x> 9 b. x> -9 and x< 9 c. x> -9 or x< 9 d. x< 9 and x< 9

You have 6 dollars +12 pennies +to quarters + 4 dimes=2 nickels how much do you have