What value of w that makes the equation true 2/3(w+3) = 7

In the 30-60-90 triangle below side s has a length of and side r has a length

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?