Answer:
1. a
2. b (i think)
3. b
4. a
5. d
im not sure bout all this but h ope it helps you
Answer:
D. 
Step-by-step explanation:
Given

Required
Determine its equivalent
<em>From the list of given options, the correct answer is</em>

This is shown as follows;

Multiply both sides by 

Open Bracket


Subtract x from both sides


Multiply both sides by -1


Reorder

<em>Hence, the correct option is D</em>

Your equations are right. just use the substitution method to solve. substitute y because both have that on one side
it'll look like 40x+30=30x+60.
then just get x in one side. I showed my owrk in the photo
Answer:
in first use the take B as a reference point then 12 will be our perpendicular and c as 90 degree represent the opposite as hypotenuse means 13 will be hypotenuse nd base will be 5.At last use Pythagoras theorem,...