Answer:
B. Step 4 is incorrect , it should be 
Step-by-step explanation:
6x-1= -2x+9
Step 1
Collect like terms and change signs if you move anything from one side to the other; 6x+2x = 9+1
Step 2: Add like terms on both sides
8x = 10
Step 3: To remain with just x on one side, divide both sides by 8 and it becomes;

The two 8s cancel each other and you remain with 
It actually depends on a.
A might be rational.
Answer:
9 is 25 10 is 26
Step-by-step explanation:
area is both sides multiplied perimeter is all sides added together
Answer:
Even if the numbers can be used more than once, this is still no solutions sice all answers will get you to 22 instead of 24.