Answer:
The average speed of the trip there is <u>86 mph.</u>
Step-by-step explanation:
Given:
Time taken to reach Portland = 3 hours
Time taken to come beck from Portland = 6 hours
Average speed for the returning trip = 43 mph
Distance traveled for the returning trip can be obtained by multiplying the returning speed by returning time. Therefore, distance for returning trip is:

Now, distance traveled for the return trip is same as going to the trip.
So, distance traveled by Jessica going to Portland = 258 miles.
Time taken to go there = 3 hours
Therefore, speed of the trip there is given as the ratio of distance and time and is given as:

Therefore, the average speed of Jessica's car to go to Portland is 86 mph.
Answer:

Step-by-step explanation:

Factorise 

cancels 2a - 7



"a" cancels "a"

Thus,
= 
Answer:
Your answer is 2.4
Step-by-step explanation:
Answer:
24x^9*z^5
Step-by-step explanation:
combine coefficients and add exponents for like terms
hope this helps you :)