The sum of two numbers:
x + y = 108
The difference of the same two numbers:
x - y = 78
We can use substitution to figure out x and y:
x - y = 78 can be changed to x = 78 + y
We can plug this into the first equation:
78 + y + y = 108
78 + 2y = 108
2y = 30
y = 15
Now solve for x using any of the two equations. I'll use the first equation since it's easier:
x + 15 = 108
x = 93
F(x)=.05x+10
<span>In the equation f(x) = .50x + 10, $0.50 is the regular ticket price. On discount day, the tickets decrease to $0.05, so now, m = 0.05.
Therefore, the new equation is f(x) = .05x + 10 </span>
There are 120 different possible groups.
(10 * 9 * 8)/(3 * 2 * 1) + 120
20.96 × 0.92 = 19.2832 = 19.3