Answer:
![\$10.70](https://img.qammunity.org/2020/formulas/mathematics/high-school/2f3ks75fc96kvejn0whpg548f1egdcbpkb.png)
Explanation:
Let
x-----> the number of miles
y ---> the total charge in dollars
we know that
The total charge must be equal to the flat fee ($3) plus the number of miles multiplied by $1.10 per mile
so
The linear equation is
![y=1.10x+3](https://img.qammunity.org/2020/formulas/mathematics/high-school/c1fzbsnxe986a53m39aeomd4fis70l4dks.png)
For x=7 miles
substitute in the equation and solve for y
![y=1.10(7)+3](https://img.qammunity.org/2020/formulas/mathematics/high-school/62zy5ad2fgmm21iqiz0t0iyr48khyehso7.png)
![y=\$10.70](https://img.qammunity.org/2020/formulas/mathematics/high-school/uxocwk29467657sulngc5gkdh489hk9z4y.png)