Firstly, you've got to expand the brackets, this becomes;
8a-4= -10a+ 50
You've then got to eliminate the -10a and you do this by adding 10a to both sides,
This then becomes 18a-4=50
You've then got to add 4, to eliminate this, which then becomes 18a=54
You've then got to divide both sides by 18, and this becomes 3.
Therefor, a=3
Hope this helps :)
First, we get rid of the negative exponent in the parenthesis. We do this by moving it to the top. Our equation is now:

Next, we can cross out one n from both the top and the bottom.

Finally, we evaluate the -2
Our equation becomes:

This becomes:

This can not be simplified any further, so this is the final answer.
The first one. For a triangle to be considered a right triangle a^2+b^2 has to equal c^2
Answer:
The awnser is 3
Step-by-step explanation:
(3+1) = 4 x 6= 24+1 = 25
;)
Answer:
No, you've already proven it's not irrational by writing it as 6/3. You get 2.
Step-by-step explanation:
An irrational number is any number that cannot be written as a fraction.