-10c+70, just distribute the the -10 to everything in the expression
Answer:
2
Step-by-step explanation:
Given
See attachment for chart
Required
Number of off days
To do this, we simply calculate the expected value of the chart.
This is calculated as:

Where
x = days
f = chances
So, we have:



She would make about 17.35 because $850 divided by 49 is 17.3469388 rounded is 17.35
C
By subtracting 18 to both sides you are separating the 3x because you are not ready to isolate the variable (x) in step 1