Answer:
3m-3n
Step-by-step explanation:
We want to simplify the expression;
2m - [n - (m - 2n)].
We expand the parenthesis to obtain;
2m - (n - m + 2n)
2m - ( - m + 3n)
Expand further to get;
2m +m -3n
Combine the first two terms;
3m-3n
Answer: 13
Step-by-step explanation: Alright with the median you take all the numbers "11, 20, 17, 8, 8, 9, 20, 13, 21" and put them in numerical order. "8, 8, 9, 11, 13, 17, 20, 20, 21" Then the middle one is the median, since there are 9 numbers you take the fifth one. In this case it is 13. (Only knew the first one since I have no idea what they mean by quartiles)
Answer:
The length of the longest side is 13mm
Step-by-step explanation:
Represent the two sides with a and b, where a is the longest
Required
Determine the length of the longest side
Perimeter of a kite is calculated as thus:
Make b the subject in
Substitute a - 1 for b and 50 for Perimeter in
Divide through by 2
Add 1 to both sides
Solve for a
<em>Hence, the length of the longest side is 13mm</em>
Error = 60-50/50 × 100
= 10/50 × 100
= 20 %
R² - 6r - 8 = 0
r² = 7.12
r = -1.12
