Anew type of pump can drain a certain pool in
10
hours. an older pump can drain the pool in
15
hours. how long will it take both pumps working together to drain the pool?

What is sin 7x/4 ? i need on this urgent trig

Write an algebraic expression to match each statement a. four less than 8 times a number b. twice the difference of a number and six c. nine from a number squared

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer