Hlp question: find 2a(3 - b) if a = 4 and b = 5. show all work for full credit

Noor brought 21 sheets of stickers. she gave 1/3 of a sheet to each of the 45 students at recess. she wants to give teachers 1 1/2 sheets each.

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

In the figure below, triangle rpq is similar to triangle rts. what is the distance between p and q? a. 24 b. 42 c.50 d. 54