15, parker bought 15 tickets by the end of the month, don't forget to subtract the initial cost of the pass.
I may be wrong but I think a senior citizen ticket costs $8.00 and a student ticket costs $14.00
Hope I helped! :)
Ratio of milk to flour = 7:21 = 1:3
that is a need 1/3 of a cup of milk for every 1 cup of flour
so for 147 cups i need 1/3 * 147 = 49 cups of milk Answer
X= -40/11
hopefully this helps
X=7
you're going to set them equal to each other. subtract the x's on both sides and add the number (in this case, 5) on both sides of the equation. then divide the x by the 21 (you get 21 by adding the 5 to the 16). 21/3 = 7