Answer:
Step-by-step explanation:
Given
There are 9 people going on a trip
They purchased coach tickets =$160
first class tickets =$1180
total budget to spend = $4500
Let coach tickets=X
So first class tickets=9-x
160x+1180(9-x)=4500
160+10620-1180x=4500
160x-1180x=4500-10620
-1020x=-6120
X=6120/1020
X=6
So answer
Coach tickets=X=6
First class tickets=(9-x)
=3.
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➷ The formula for surface area of a cylinder is:

The radius is half the diameter
radius = 8/2 = 4
Substitute the values in:

Solve it:
surface area = 
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If you're looking to find X, then X would equal 16, since 16 minus 3 would equal 13