Answer:
The answer is 91
Step-by-step explanation:
90 x 6 = 540
The numbers need to equal 540 all together to make an average of 90.
97 + 86 + 83 + 95 + 88 = 449
540 - 449 = 91
To check:
97 + 86 + 83 + 95 + 88 + 91 = 540
Therefore, the answer is 91
Answer: D.
Step-by-step explanation:
In the given figure, we have an obtuse triangle which has sides a, b, and c, and the angle opposite the side of length b is obtuse.
∵ In a triangle, the side opposite to the largest angle is largest.
Thus, the largest side in then given obtuse triangle= c
The Pythagorean inequalities theorem says that If a triangle is obtuse than the square of the largest side is greater than the sum of square of other two sides.
Therefore, we have

(n+20)*2 = 99.2
distribute
2n + 40 = 99.2
subtract 40 from each side
2n = 59.2
divide each side by 2
n = 29.6
Answer:
28x + 7y = 14.
Step-by-step explanation:
Just add the 28x to each side.