How to markdown numbers

Solve the compound inequality & graph solution set: - 3x-2>5 and 5x-1≤-21. My question: Why isn't the ≤ switched when dividing 5x by - 21?

Factor: 4x2 - 6x - 2x + 3

In a class of 32, 24 likes swiming. what percent of the class likes swimming?

Without doing the math, determine which is greater, 40 times 1/4 or 40 divided by 1/4. Explain your reasoning.

How many significant figures does 2.4 have?

24 students will be divided into 4 equal-sized teams. Each student will count off, beginning with the number 1 as the first team. If Nate is the 11th student to count off, to which team number will he be assigned?

Multiply out and simplify (x-8) squared

Linda purchased a prepaid phone card for $30. Long distance calls cost 13 cents a minute using this card. Linda used her card only once to make a long distance call. If the remaining credit on her card is $25.45, how many minutes did her call last?

3 pumps, working 8 hours a day, can empty a tank in 2 days. how many hours a day must 4 pumps work to empty the tank in 1 day?

Shane's mother is training for a marathon. on saturdays, she does a 10 mile run in 90 minutes. what is her average speed in miles per hour?