What is the area of the figure shown? 3 in. 10 in. 5 in. 10 in.​

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle