Reba needs to simplify the expression below. 6 and one-half + 3.5 times 2 minus 7 divided by 3

Which operation should she perform first?

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer