When iris subtract -), she got a difference of -24 is her answer correct? if not what mistake did she make?

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

Jim had 15 minutes to do 5 laps around his school what would his time be