$45 x .15 = 6.75
This is the amount that she saved
$45 - 6.75 =
The amount that she still needs to save.
To find a, you need to isolate/get the variable "a" by itself in the equation:
Multiply the inverse of 1/2, which is 2, to get rid of the fraction

a - 7 = 66 Add 7 on both sides to get "a" by itself
a - 7 + 7 = 66 + 7
a = 73
12.347
- 9.432
------------
2.915
The answer is:
D. 2.915 kilometers
Answer: B
Step-by-step explanation: