It seems correct to me- i don’t see anything wrong so far
You have a lot of questions here, I can help you with a few of them.
When you simplify the polynomials, you put together all of the terms that have the same degree. That means the variables have the same exponents. The number of terms are the items separated by plus and minus signs.
Here are the answers for the first three:
1)

2)

3)
Answer:
x = 2
Step-by-step explanation:
Step 1: Write equation
3x - 5 = 1
Step 2: Solve for <em>x</em>
- Add 5 to both sides: 3x = 6
- Divide both sides by 3: x = 2
Step 3: Check
<em>Plug in x to verify it's a solution.</em>
3(2) - 5 = 1
6 - 5 = 1
1 = 1
Primes are
2,3,5,7,11,13...
ok, so it must be multiplule of 2,7 and 11
2*7*11=154
answer is 154