System of equations:
x + y = 23
x - y = 7
Add them together
2x = 30
x = 15
Now plug 15 into one of the equations:
15 + y = 23
y = 8
your two numbers are 15 and 8
Add them all up and divide by 30. Answer: $55.20.
A, $1.42. i found this answer plugging in 1.42 and seeing if it would work or not
Answer:
b. 5/7
Step-by-step explanation:
The line goes through the points (0, 0) and (7, 5). Let's use those points in the slope formula:

The slope of that line is 5/7