evaluate the following if a equals 7 b equals 3 and C equals to 8 to the second minus 5 BC - 1 show how you got your answer
1 answer:
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Answer:
She needs a grade of 71 on her next text.
Step-by-step explanation:
Mean of a data-set:
The mean of a data-set is the sum of all values in the data-set divided by the number of values.
Tammy has scored 82, 78, and 93 on her previous three tests.
Thus, her grades are 82, 78, 93 and x, in which x is her grade in the fourth test.
There are 4 tests.
What score does she need on her next test so that her average (mean) is 81?
We have to find x when the mean is 81. So
She needs a grade of 71 on her next text.
37 + x = 2(14 + x)
Explanation:
subtract both sides by 28
9 + x = 2x
subtract both sides by x
9 = x
Explanation:
subtract both sides by 28
9 + x = 2x
subtract both sides by x
9 = x