Answer:
p =43/2
Step-by-step explanation:
8/9 = 12/(p-8)
We can use cross products
8 * (p-8) = 9*12
Distribute
8p - 64 = 108
Add 64 to each side
8p -64+64 = 108+64
8p =172
Divide by 8
8p/8 =172 /8
p =43/2
75/200 movie goers watching 3D were students. 37.5% were students
50/100 movie goers watching 2D were students. 50% were students.
1 - 2 = 1 3 - 4 = 1 5 - 9 = 4 9 - 9 = 0 7 - 14 = 7 21 - 0 = 21 8 - 12 = 5 4 - 85 = 81 x is 8 and z is 5. x - z = 3 d is 2 and 8 is w and 17 is y. d - w - y = 7
For his total monthly bill to be under a twenty dollars he could make a 149 calls
20-5=15
15/.10=150
150-1=149
15-.10=14.9
14.9+5=19.9
So the maximum number of calls he can make is 149 a month
