What number needs to be added to 4 and 7 so that the ratio of the first number to the second becomes 2:3?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation

Astrid spent $36 on new shoes. this was $12 less than twice what she spent on a new skirt. part a: which equation would solve for how much she spent on the skirt? part b: solve the equation in the workspace provided below. how much did astrid spend on her skirt?