Given:
The function that represents how the amount of fuel changes as a function of distance flown is

where x represents miles flown, and f(x) represents the amount of fuel remaining.
To find:
The rate of change for this scenario.
Solution:
The slope intercept form of a linear function is
...(i)
Where, m is the slope or rate of change and b is the y-intercept.
We have,
...(ii)
On comparing (i) and (ii), we get

Therefore, the rate of change for this scenario is -0.9. It means, the amount of fuel in the airplane is decreasing by 0.9 gallons per mile.
For the first one it’s subtraction property of equality
Answer:
1.6238 × 10^8
Step-by-step explanation:
Sum of angles of a triangle = 180°
91 + 10x - 4 + 8x +3 = 180
18x + 90 = 180
18x = 90
x = 5°
Answer:
Music land has the better deal with each CD costing only $7.44 compared to $9.80 at CD City.
Step-by-step explanation:
In order to find the price per CD, you must divide the cost by the number of CDs in the bundle.
<u>Music Land</u>
$59.50/8 CDs = $7.44 per CD
<u>CD City</u>
$49/5 CDs = $9.80 per CD
Therefore, we know that Music Land is a better deal.