13. all you do is multiply it out and combine like terms
5(z + 3) - 4(1 +p)
(5z + 15) - (4 + 4p)
distribute negative sign
5z + 15 - 4 - 4p
5z + 11 - 4p
14. He bought seven oranges for .25. so:
7 * .25 = 1.75
he bought bananas for .15. so:
b * .15 = .15b
so .15b + 1.75
15. Well we can easily see which ones only have 2 terms. a coefficient is the number connected in front of the variable. So if I said 6x then 6 is the coefficient.
in c, there are 2.terms and 6 precedes variable
16. just plug in x and y
-7(3) + (-12/3)
-21 - 4
-25
