Answer:
60
Step-by-step explanation:
∑[i=1,5] 4i = 4·1 + 4·2 + 4·3 + 4·4 + 4·5
= 4 + 8 + 12 + 16 + 20
= 60
$3.60
You can get this by determining that the rate of which they are paid is $4 an hour (divide the total by the amount of hours). Then you can find the rate of which they collect dues by dividing the amount they paid by their total (3%).
Using those numbers you can find the total amount the second person paid.
For this case what you must do is to graph both lines. (See attached graph) and see where both are cut.
We note that both lines are cut at the point (2,5)
Therefore the solution for f (x) = g (x) is x = 2
answer x = 2