Sally bought 4 shirts and 6 pairs of pants and spent $285. Mary bought 7 shirts and 3 pairs of pants and spent $255. How much were
the shirts and the pants?

Let the mean of the population be 38 instances of from 6" - 9" hatchings per nest, and let the standard deviation of the mean be 3. what sample mean would have a confidence level of 95% or a 2.5% margin of error?

(! ) three cylinders have a height of 8 cm. cylinder 1 has a radius of 1 cm. cylinder 2 has a radius of 2 cm. cylinder 3 has a radius of 3 cm. find the volume of each cylinder

An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?