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:
-2
Step-by-step explanation:
If we have an equation of the form y = mx +b then the y-intercept is b.
So now here we have y =-x - 2. Therefore b = -2 and we conclude the y-intercept is -2.
1. Plug in 8 into x.
The equation will be 10(8)+5
2. Solve multiplication
80+5
3. The answer is 85! Hope this helped <3
Answer:
57, 59, and 61.
Step-by-step explanation:
