63. Liv volunteered for h hours. If Gavin volunteered for 4 fewer hours than Liv, then Gavin volunteered (h-4) hours. Together they volunteered h+(h-4) hours that is 50 hours.
Thus, the equation is
h+(h-4)=50.
64. Brendan rides his bike at a constant speed, s, for 0.75 hours. The speed multiplied by the time gives the distance, then
[tex]d=0.75\cdot s.[/tex]
65. Alexis swam m meters. If Sade swam half as many meters as Alexis, then Sade swam [tex]\dfrac{m}{2}[/tex] meters. In total they both swam [tex]m+\dfrac{m}{2}[/tex] meters that is 200 meters.
Therefore, the equation is
[tex]m+\dfrac{m}{2}=200.[/tex]
66. Grace ate g peanuts. If Grace ate five more peanuts than Keona, then Keona ate 5 less peanuts than Grace. Thus, Keona ate (g-5) peanuts. Together they ate g+(g-5) peanuts that is 40 peanuts.
The equation that represents this problem is
g+(g-5)=40
