look at the paterns. the 2 times always end in 2,4,6,8 or 0. if you know your three times table it would be easy for you to know your 6 just add 3 and do it again
NEED HELP ASAP ILL MARK BRAINLIEST IF ITS RIGHT!!!
1 answer:
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Answer:
or x+3/x
Step-by-step explanation:
Using D.O.T.S (difference of two squares) formula :
Factorise the second bit:
Now write out this fraction:
Now we can cancel out repeated terms (x-3):
This is our final answer:
Answer:
11
Step-by-step explanation:
To find the mean of a set of numbers, we add all of the numbers together and divide the sum by the size of the set. For that first set, we have three numbers, x, y and z, so the equation for their mean would be
We can rearrange this equation by multiplying both sides by 3, getting the equivalent equation
Let's do the same thing for the second mean:
With the two equations we've obtained, we can subtract (1) from (2) to get rid of x, y, and z, leaving us with
To find the mean of a and b now, all we have to do is divide both sides of the equation by 2, and we see that