we are given

we can see that 3 is not present in the options on exponent
so, we will try to get rid of exponent 3
we can write it as

now, we know that

so, we can plug it
and we get

so, option-2......................................Answer
Answer: 8.75 Miles
Explanation: In this scenario, you want to add 2.2 to 6.55 to get the initial elevation, and by completing the equation 6.55 + 2.2, you would get your answer of 8.75
"Each plan utilizes a combination of 2 strength-training sessions and 2 aerobic exercise sessions per week." because.
Let n be the number of aerobic and strength-training exercises per week.
Let x be the number of strength-training exercises per week on the beginner
15x + 20n = 90
Let y be the number of strength-training exercises for week on the advanced plan.
20y + 30n = 130
Multiply both sides by 1.5, to get:
22.5x + 30n = 135
Subtracting equation 2 from 3 we get:
22.5x - 20y = 5