Answer is in a photo. I can only upload it to a file hosting service. link below!
bit.
ly/3a8Nt8n
Question 3 is: D. All integers are rational numbers.
Question 4 is: C. the counting number is 4. Hope this helped :)
Perimeter is the sum of all the sides. So we can set up an equation:

Now solve for 'x', combine like terms:
When it comes to terms with variables it's just like normal addition but we keep the variable:


So we have:

Add:

Subtract 7x to both sides:

Subtract 4 to both sides:

Divide 5 to both sides:
Answer:
3.9
Step-by-step explanation:
8 is rounded up because of 7