Evaluate the expression for p = –4. 3p2 − 18(–2 − p) =
1 answer:
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Answer:
Step-by-step explanation:
First, we expand the equation using the distributive rule:
Hence,
Simplify:
Add like terms:
Subtract 13 from both sides:
Divide both sides by -8:
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.