What basic math skills should I know for grade 9 math

Which problem can be solved using this equation? 0.15m+35=0.25m+20 a.) Clear Check One phone company charges $35.15 per minute. The other phone company charges $20.25 per minute. For how many minutes, m, do the companies charge the same amount? b.

3 (9+x) = 51 How would you do this

The sum of a number and - 3 is equal to - 91. Find the number

Rosy waxes 2/3 of her car with 1/4 bottle of car wax what fraction of the bottle of car wax will rosy to wax her entire car

Tiffany is 140 miles away from Maggie. They are traveling towards each other. If Maggie travels 5 mph faster than Tiffany and they meet after 4 hours how fast was each traveling

Wayland purchased new speakers that were on sale for 30% of the regular price. He saved $36 which is 30% off. What is the regular price of the speakers when they were not on sale?

What is the answer for 33 and 1/2 times60

Three more than 7k written in algebraic expression

A polygon of 7 line segments has __ vertices? 5 8 7 6

a hot air ballon cruising at 1000 feet begins to ascend. it ascends at a rate of 200 feet per minute Writing problems into slope intercept form