Answer:
Kevin needs 96 points on his last test to raise his mean test score to 90 points.
Step-by-step explanation:
we know that
The mean score is the total of all scores divided by the total number of tests.
Let
x_1 ----> the score in the first math test
x_2 ----> the score in the second math test
x_3 ----> the score in the third math test
x_4 ----> the score in the fourth math test
we have
After taking the first 3 tests, his mean test score is 88 points
so

----> equation A
How many points does he need on his last test to raise his mean test score to 90 points?
so

----> equation B
substitute equation A in equation B

solve for x_4


Therefore
Kevin needs 96 points on his last test to raise his mean test score to 90 points.
Answer:
The answer is 78
Step-by-step explanation:
99-78=21
The perimeter of the rectangle is 16
Answer:
Here is the graph to the intercepts.
Step-by-step explanation:
Graph of (6, 4), (4, 3), (-2, 0)
Hope it helps :)
Answer:
part A: Mean:6.42 Median:7
Part b: median
Part c: no it’s skewed left and unimodal
Step-by-step explanation: