Answer:
Mean: 12
Median: 11
Step-by-step explanation:
For the median you would put the numbers in order from least to greatest (5, 5, 6, 7, 10, 12, 17, 18, 20, 20) then find the middle. But in this case, since there is two in the middle, you add them and divide that number by 2.
For the mean, you add all of the numbers up together to get 120. Then divide by the amount of numbers there are, which is 10, to get 12.
Answer:
The mistake she made was ; She didn't change the sign when subtracting -3/4 from both sides
She wrote 5/4+3/4 instead of 5/4-3/4
Step-by-step explanation:
Correct solution:
Subtract-3/4 from both sides
Simplify
Answer:
7. 23
8. 18
9. 55
10. 17
Step-by-step explanation:
Answer:
no. 4
Step-by-step explanation:
=25x - 125/x^2 - 25
=25(x-5) / x^2 - 5^2
=25(x-5) / (x-5) (x+5) <use of formula a^2 - b^2=(a-b) (a+b)>
=25/x+5 <cut (x-5) on both side>
