Using the Pythagoras therorem
We get the answer as
Root of (12squared +5squared)
Root of (144+25)
Root of 169
12a-a (hope this helps :)
To find the mean you need to add up all numbers (or subtract if it’s negative) and divide by how many numbers there were. Example: there were 5 answers (days) so if you add/subtract all the days it’s -34 and divide it by 5 to get -6.8.
5x^2 - 13x + 6
(8x^2 - 6x + 2) - (3x^2 + 7x - 4) =
First, drop the first set of parentheses because they are unnecessary.
= 8x^2 - 6x + 2 - (3x^2 + 7x - 4)
Now, distribute the minus sign to the left of the set of parentheses. Think of that negative sign as -1 multiplied by the parentheses. You change every sign inside the parentheses.
= 8x^2 - 6x + 2 - 3x^2 - 7x + 4
Next, group like terms together.
= 8x^2 - 3x^2 - 6x - 7x + 2 + 4
Finally, combine like terms.
= 5x^2 - 13x + 6
or a frent sozzz