Answer:
9 first class tickets and 8 coach tickets
Step-by-step explanation:
c + f = 17......c = 17 - f
270c + 1140f = 12,420
270(17 - f) + 1140f = 12,420
4590 - 270f + 1140f = 12,420
-270f + 1140f = 12,420 - 4590
870f = 7830
f = 7830 / 870
f = 9 <==== 9 first class tickets
c + f = 17
c + 9 = 17
c = 17 - 9
c = 8 <==== 8 coach tickets
9 is the answer u are looking for
You can write as 0.45 or 0.00.45
If x is the number of tickets she has left, then 2x is the number she has used (2×number of rides she has gone on). So the number she has left would be...
14 - 2x
We can now find an equivalent expression by replacing the x with a number... for example...
14 - 2(2)
This would be if she rode two rides. You could solve the equation like this...
14 - 2x =
14 - 2(2) =
14 - 4 = 10
After 2 rides she has 10 tickets left.
Set up the composite function and evaluate
fg (x^2)=gx^4