You are planning a field trip to a museum. The bus ride will coast $250. Admission is $8 and lunch $5 for each person. Write two expressions to find the total coast for x students.
What would the coast be if 20 students went on the trip?
2007-07-14 15:51:26 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
The bus ride is constant, so you know that you will have 250 + something. The admission and lunch are PER student, so you can write it as 8x for admission and 5x for lunch.
So, you have c=250+8x+5x
You can simplify the 8x and 5x to get 13x, so you also have c=250+13x
Just plug in 20 for x and solve: c=250+13*20. Don't forget to multiply 13 and 20 first, then add 250.
2007-07-14 15:56:41 · answer #1 · answered by korie55 2 · 0⤊ 0⤋
C = 250 + (8+5)x
When x = 20, C = 250 + 13*20 = $510
2007-07-14 22:58:49 · answer #2 · answered by Steve A 7 · 0⤊ 0⤋
Let the cost be c(20) if 20 students went on the trip.
c = 250+(8+5)n, n is the number of students.
or
c = 250 + 13n
c(20) = 250+13(20) = $510
2007-07-14 22:57:07 · answer #3 · answered by sahsjing 7 · 0⤊ 0⤋
x = # of students
Cost = 250 +8x +5x
Cost = 250 + 13x
Cost(20) = 250 + 20*13 = $510
2007-07-14 23:00:06 · answer #4 · answered by ironduke8159 7 · 0⤊ 0⤋
250 + x(8 + 5)
since the 250 wont change, u just multiply the admission and lunch by the number of students, x.
for 20 it would be...
250 + 20x13.
=
$510
2007-07-14 22:56:47 · answer #5 · answered by zlocke17 2 · 0⤊ 0⤋
cost per student = 8+5=13
if x students go then 13x + 250 is the total cost expression
if 20 students go then x=20 & 13x plus the 250 is $510 total
2007-07-14 22:58:58 · answer #6 · answered by 037 G 6 · 0⤊ 0⤋