
Katie M. answered 09/11/16
Tutor
New to Wyzant
Certified Teacher Specializing in English, Writing, and Test Prep
This is a multi-step problem. First we need to determine two different equations to represent the two values we need to know. Equation 1 represents the number of tickets sold. Equation 2 represents the total amount of money raised.
The sum of the number of students and non-students is equal to 410.
If x=number of students and y=number of non-students then x+y=410
The total amount of money raised was $1251.
2.5x=money from student tickets and 4.5y=money from non-student tickets
Our equation would look like this: 2.5x+4.5y=1251
In order to solve the second equation, we have to solve the first equation for either x or y. (solve for x)
x+y=410 (subtract x from both sides)
x=410-y
We then replace x in the second equation with the x in terms of y
2.5x+4.5y=1251 (solve for y)
2.5(410-y) +4.5y=1251
1025-2.5y+4.5y=1251 (combine the y's)
1025-2y=1251 (subtract 1025 from both sides)
-2y=226 (divide by -2)
y=-113 (multiply by -1)
y=113
Now we can replace y in the first equation with our value for y: 113
x+y=410
x+113=410
x=297
We can check our work by plugging these values into each equation.
x+y=410
297+113=410
410=410
2.5x+4.5y=1251
2.5(297)+4.5(113)=1251
742.5+508.5=1251
1251=1251
So, because our work checks out and the equations are true, we know that 297 students and 113 non-students attended.
Hope this helps!