Find the mean of the first four test scores first.
(Add all numbers in set and divide by how many numbers there are)
81 + 87 + 71 + 89 = 328 / 4 = 82
Then, find the mean with the 85 added as the fifth term.
81 + 87 + 71 + 89 + 85 = 413 / 5 = 82.6
The impact that the 85 had on the mean test score was that the mean/average increased by 0.6.
Answer:
It would be -7
Step-by-step explanation:
The 12 is negative, so instead of adding, you would subtract 5.
Answer: y = -x + 7
Step-by-step explanation:
The slope is 
, so we know the equation is of the form 
.
Substituting in the coordinates (1,6) to find b,
Thus, the equation is y = -x + 7
I dont know what you're asking, the property? That is distributive, and the answer of the expression is 7y+35
We know from the slope intercept form that y=mx+b so the y intercept is 12 while every hour the cost goes up by 8
