Invers proportion it takes 12 workers 3 weeks to complete four project. each project take same numbers of hours

a) at this rate how long would it take fifteen workers to complete ten project? = 6 weeks

b) the ten projects need to be completed in under four weeks. what is the minimum number of workers be needed, given that they all work at the same rate as the original workers ? ( i know answer i need axplaning ) :]

Which problem could be  solved  by evaluating the expression  7×(−3)7×-3?

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

Which elements in the set below are integers? 12, –3⁄4,√ 25 , –7, √ 5 , 14⁄7, 9 a. 12, √ 25 , –7, 9 b. 12, √ 25 , –7, 14⁄7, 9 c. –3⁄4, 25 , √ 5 ,14⁄7 d. 12, –7, 9