Find 2a(3 - b) if a = 4 and b = 5. show all work for full credit.

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

Which ordered pair (c,d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

Find the value of the variable and the length of each secant segment.