Answer:
B. 24
Step-by-step explanation:
The way to find range is by putting the set from largest to smallest, then subtracting the highest number from the lowest. In this case, the highest number would be 31, and the lowest would be 7. So 31-7=24 which is your range. Hope this helps! (please give brainlist!) :)
Expression:

We can add just the terms that are similar, as follows:

Simplifying:

Answer: B.
Answer:
The speed of the jet in still air is 415 mph and the speed of the wind is 19 mph
Step-by-step explanation:
we know that
The speed is equal to divide the distance by the time
Let
x -----> the speed of the wind in miles per hour
y ----> the speed of the jet in still air in miles per hour
we know that
<em>With a tailwind</em>

----> equation A
<em>With a headwind</em>

----> equation B
solve the system of equations A and B by elimination
Adds equation A and equation B

<em>Find the value of x</em>



therefore
The speed of the jet in still air is 415 mph and the speed of the wind is 19 mph
4x + 1 = 6y
4x/6 + 1/6 = 6y/6
2x/3 + 1/6 = y.
4/6 is the same as 2/3 in lowest terms.