A discount store buys a shipment of swing sets at a cost of $210 each. The swing sets will be sold for $609 apiece. What percentage is the mark-up?

A computer and printer cost a total of $1284. The cost of the computer is three times the cost of the printer. Find the cost of each item.

I don't know how to do something

If there are more negative counters than positive counters, what will the sign of the sum be?

Mary purchased a prepaid phone for 15$

If 11x - 7 = 2, then x=

walt averages 98 miles per hourin 4 races. if each race is 95 miles in lenght, how many miles did walt drive in the race?

What are all the sets of numbers for 2/3

What is the square root of 16x36? 4x6 4x18 8x6 8x18

4x-5 (x-2) = 12x+4-x ?

To maintain an acceptable level of chlorine in your pool you add 1.4gallins of chlorine. This is 0.007℅ of the amount of water in your pool. How many gallins of water are in your pool