Subtract 3 first so it would be 7x=15
then divide by 7 so x would be approximately 2.14
There is 2 formulas u will end up the same answer
Formula 1:

formula 2:
ab reperesent the 2 legs u cannot use the hyp
You can use any but i'll use the first one
==> 
==>
==> 832.5 is the answer
Here is you're answer:
In order to get you're answer you need to find the common denominator then add.

- Find the common denominator:


- Simplify:
-


Therefore you're answer is option D "13/24."
Hope this helps!
X=8 is the answer.
Sorry if it’s wrong
A True
The first condition gives that the function is in fact a function and the second condition makes it a one to one