Answer:
Yes
Step-by-step explanation:
Answer:
<u>1. (a-5)(a-7) </u>
a2 - 12a + 35
<u>2. (x-2y)(3x+4)</u>
3x2 +4x - 6xy - 8y
<u>3. (4x+3y)(4x-3y)</u>
16x2 - 9y2
<u>4. (6x-7y)(6x+7y)</u>
36x2 - 49y2
(the twos after the letters means squared)
:)
Mean = it's really just another word for average. You add all the values up together, and divide the sum by the number of values there are. So here :
9 + 13 + 9 + 10 + 10 + 9 + 10 + 10 + 11 + 9 = 100
And now, you count how many values there are ^ up there. There are 10 values (just count how many numbers there are) and then you have to divide 100 by 10.
100 ÷ 10 = 10
Your MEAN is : 10
