On a bicycle, Adriana rides for 2 hours and is 22 miles from her house. After riding for 7 hours, she is 72 miles away. What is Adriana's rate?

Step-by-step explanation:

Notice it is not asking for an average rate, just her current rate. Approach this like this: say she is at the 29 mile "marker." In 3 hours, she gets to the 38th mile "marker." Therefore:

38-29 = 9, so in 3 hours, she went 9 miles.

9 miles/3 hours = 3 miles per hour, which would be equal to her current rate.

according to egenuity the answer is

step-by-step explanation:

d. 344.22

x = 3 ± √(5+y)