Mildred has seven grades on her report card. The overall average of these grades is 77%. After looking more closely at her repor
2 answers:
Answer:
86%
Step-by-step explanation:
We have been given that Mildred has seven grades on her report card. The overall average of these grades is 77%.
Since her average grades are 77, so total scores on 7 grades would be
As her grades on English were incorrectly recorded as 18% instead of 81%, so we will find the difference of grades.
Since the incorrect total is 63 less than actual total, so we will add 63 points to total grades as:
Now we will divide actual sum by 7 to find actual report card average.
Therefore, Mildred's actual report card average is 86%.
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Answer: 
Note: to write the domain in interval notation, you'd write [-4,5]
if you need the domain in set-builder notation, then you'd write
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Explanation:
The domain is the set of possible x input values. Look at the left most point (-4,-1). The x coordinate here is x = -4. This is the smallest x value allowed. The largest x value allowed is x = 5 for similar reasons, but on the other side of the graph.
So that's how I got (x is between -4 and 5; inclusive of both endpoints)
Writing [-4,5] for interval notation tells us that we have an interval from -4 to 5 and we include both endpoints. The square brackets mean "include endpoint"
Writing is the set-builder notation way of expressing the domain. The 
portion means "x is a real number"
Note: to write the domain in interval notation, you'd write [-4,5]
if you need the domain in set-builder notation, then you'd write
------------------------------------------------------------------------------
Explanation:
The domain is the set of possible x input values. Look at the left most point (-4,-1). The x coordinate here is x = -4. This is the smallest x value allowed. The largest x value allowed is x = 5 for similar reasons, but on the other side of the graph.
So that's how I got
Writing [-4,5] for interval notation tells us that we have an interval from -4 to 5 and we include both endpoints. The square brackets mean "include endpoint"
Writing