Answer:
Let the test scores be x1, x2, x3, x4
(x1 + x2 + x3)/3 = 88
x1 + x2 + x3 = 264
(x1 + x2 + x3 + x4)/4 = 90
264 + x4 = 360
x4 = 360-264
x4 = 96
Therefore he should get 96 marks in his 4th test to raise his mean test score to 90
The mean score is the total of all scores divided by the total no. Of tests
Hope this helps!
Answer:
assuming the comma is meant to be a decimal...
It would be 2.9
Step-by-step explanation:
the place right after the decimal is the tenth place. the 5 rounds up the 8. don't worry about the 2. so the 8 becomes a 9 and you leave off the rest because you are only worrying about the tenths place.
The answer for finding the slope is -1/2
Answer:D. 429.5 ft
Step-by-step explanation:
Divide 859 in half and you get 429 with remainder of 5.
The greatest common factor of 8 and 52 is 2.
<span><span>8: 222 </span><span>50: 2 55</span><span>GCF: 2 <span>
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