Given:
The function is:
To find:
The inverse of the given function, then draw the graphs of function and its inverse.
Solution:
We have,
Step 1: Substitute 
.
Step 2: Interchange x and y.
Step 3: Isolate variable y.
Step 4: Substitute 
.
Therefore, the inverse of the given function is 
and the graphs of these functions are shown below.
Inequality: 20+40n≤260
Graphing inequality is in the picture I posted.
Answer:
14. 1 inch = 96 miles (12 × 8)
1/2 inch = 48 miles (96 ÷ 2)
96 + 48 = 144 miles
3 3/4 = 3.75
144 ÷ 3.75 = 38.4
A. 38.4 mph
15. Adding a negative number is the same as just subtracting.
D. 35(2) - 1/2(15)
20. - = withdrew because you are subtracting
+ = deposited because you are adding
D. Peter withdrew $47.27 and deposited $598, increasing his bank account by $550.73
21. Yana: 7 - 3 + 6 - 1 + 8 - 2 = 15
15 ÷ 6 = 2.5 average
Amber: 1 + 5 - 2 + 4 - 2 + 6 = 12
12 ÷ 6 = 2 average
2.5 - 2 = 0.5
A. Yana's average number of points is 0.5 point greater than Amber's
