PEMDAS: distribute the negative to (-2-5x) so it becomes (2+5x)+(-2)=18
Add 2 to both sides: 2+5x=20
Subtract 2: 5x=18
Divide 5: x= 18/5
Answer:

∠
°
Step-by-step explanation:



- The cosine of an angle is equal to the side adjacent to the angle over the hypotenuse, the longest side.

- We need to find the hypotenuse of this triangle. This is relativly easy to do with a right triangle; we can just use the Pythagorean Theorem.
- Pythagorean Theorem:
where
,
, and
are the 3 different sides of a right triangle.

- Our hypotenuse is
. Now we can finish solving for ∠
.

∠
°
It’ll be D because to the left it’ll be negative
Answer: Well what I see Is 5 to 10 then 20 then 40 so we add to 30 then 40 and 50 so 5 10 20 40 70 110 160
Step-by-step explanation:
54 because if x+y=82 and x-y=26 add 26 and 82 is 108 the divide it by 2 your answer is 54