Answer:
![80 = 18.50h + 6](https://img.qammunity.org/2021/formulas/mathematics/high-school/c0w6nkgwaehsm4sy4cckguiednpw99ge4a.png)
Explanation:
Given
![Amount = \$80](https://img.qammunity.org/2021/formulas/mathematics/high-school/kj12gwmis793kf26xjcquomlocuu8grahf.png)
per hour
![Helmet = \$3.0](https://img.qammunity.org/2021/formulas/mathematics/high-school/gqnkxzwkv9vob7kkhii1wrjro3yzmmnn25.png)
![Individuals =2](https://img.qammunity.org/2021/formulas/mathematics/high-school/rnc3xo79vwbhwbkmr2o5euws93hvkfi1bf.png)
Required
Derive an expression for the scenario
A tandem bike allows 2 individuals to ride on it at a time.
So, they will only pay for one rental fee because both can ride on it at the same time.
However, they need to get separate helmets.
For Helmets, they will spend:
![\$3 * 2 =\$ 6](https://img.qammunity.org/2021/formulas/mathematics/high-school/q607g5jf9ureh5j61bojqyvuvfbrfie5mp.png)
For Rental, they will spend
for h hours.
![Total = Rentals + Helmets](https://img.qammunity.org/2021/formulas/mathematics/high-school/p4xknf9o5z5gdxrfl9nnzr5jb3x5njwc5y.png)
![Total = 18.50h + 6](https://img.qammunity.org/2021/formulas/mathematics/high-school/etzehs825cjvzhpm56zk7kuumhw4uvbc4l.png)
Recall that they have just $80 to spend
So, substitute 80 for total
![80 = 18.50h + 6](https://img.qammunity.org/2021/formulas/mathematics/high-school/c0w6nkgwaehsm4sy4cckguiednpw99ge4a.png)
Hence, option C answers the question.