Your friend has $90 when he goes to the fair. He spends $5 to enter the fair and $15 on food. Rides at the fair cost $1.50 per ride. Which function can be used to determine how much money he has left over after x rides?
Easy, if he has $90 in ALL
and he spends $5 and $15
$20 in total
take, 90-20=70
So now he only has $70 left.
If each ride costs $1.50, then he's losing money.
So, y=-1.50x+70
So around the 47th ride he will have no more money.
Answer:
\(f(x)=70-1.5x\) or \(f(x)=-1.5x+70\)
Step-by-step explanation:
Money taken to the fair = $90
Money spent to enter the fair = $5
Money spent on food =$15
Total he spent now is given by : @@MATH_TOKEN_2@@ dollars
Let the number of rides be = x
And he spends $1.50 on each ride, so total money spent on rides = \(1.50x\)
Total money including rides can be shown as:
\(20+1.50x\)
Now money left after this will be \(90-(20+1.50x)\)
=\(70-1.50x\)
Let f(x) denotes the function used to determine the money left after rides,
\(f(x)=70-1.5x\) or \(f(x)=-1.5x+70\)