18) In this problem they are telling you that the cost of the gifts are given by the equation:
[tex]5g+15=140[/tex]So to know the cost of each gift we can solve for g so:
[tex]\begin{gathered} g=\frac{140-15}{5} \\ g=25 \end{gathered}[/tex]So he has 25 gifts for each gift. So is B.
19) now the expression that represent the number of games is:
[tex]4x-3=y[/tex]So the correct expression is:
A) Lori owns 3 less games than 4 times the number of games that have nathan.