HELP ASAP 1. 45% of what number is 63
2. 95% of what number is 57
3. 85% of what number is 102

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

What is the product? a-3/15a × 5/a-3