$60 , because 20%=10%+10%, and 75 10%=7.5, 7.5+7.5=15, so 75-15=60
I think I can bravely ignore the Freudian slip and solve this one.
-- If the mean of 5 tests is 90, then all 5 scores add up to (5 x 90) = 450
-- The sum of her first 4 scores is (95+ 90 + 85 + 95) = 365
-- If she has one more test to average 90, then she needs
to score (450 - 365) = <u>85</u> on it.
That looks like choice 'G '.
Answer:
See below.
Step-by-step explanation:
By the rational roots theorem all possible roots are:
+/-1. +/- 2, +/-4 .+/-8, +/-16 and +/-32.
There are 8 equal parts. Each part is 1/8 of the whole 8/8
Answer: 
Step-by-step explanation:
First, we need to find the common denominator
The easiest way to do this is by multiplying the two given denominators, which are 2 and 5.
2 × 5 = 10
So, our common denominator is 10. Then, multiply the numerators of the two fractions by 2 and 5. Here's why:
=
We multiplied the top and bottom by 2 to make sure our new fraction stays equivalent to the original fraction.
Do the same thing for the other one:
= 
Finally, subtract the two fractions to find the difference between the two times:
= 
The reason we used the common denominator is because we can only add or subtract fractions if they have the same denominator.