First One is the bottom one on the first column.
Second one is the top one on the first column.
xxx
X=3
X/-3 = -1 ,Leave X by itself so multiply by -3 on both sides.
X = -1*-3
X = 3, negative times negative equals positive.
Answer:
Part 1) 
Part 2) 
Step-by-step explanation:
we have

The cos(A) is negative, that means that the angle A in the triangle ABC is an obtuse angle and the value of the sin(A) is positive
The angle A lie on the II Quadrant
step 1
Find the measure of angle A

using a calculator

step 2
Find the sin(A)
we know that

substitute the value of cos(A)




step 3
Find tan(A)
we know that

substitute the values

Simplify

The last one is the correct answer
<span>-5/s -1/2s
.The least common denominator is 2, since 2 is divisible by 1 and by 2
The answer will be : </span><span>-5/s -1/2s = -10/2s - 1/2s = -11s/2</span>