Answer:
A 
Step-by-step explanation:
Perimeter = the sum of all side lengths
Perimeter = 
Perimeter = 15 (in this case)
so...

And we're trying to solve for x.
Step 1. Subtract 6 to both sides

Step 2. Add 3 to both sides

Step 3. Combine like terms

Step 4. Solve for x


Answer:
The constant between two consecutive terms is called the common difference. The common difference is the number added to any one term of an arithmetic sequence that generates the subsequent term.
Answer:
x = 4.5 is the answer to the question
What do you mean? That question doesn't make sense.
Answer: x= 2.5, y = 10
Step-by-step explanation:
<u><em>I'm going to assume that these photocopies are proportional in relations to each other.</em></u>
If they're proportional, you can set up two proportions:

And cross-multiply:

Then solved for x and y:
