Answer:
all work is shown and pictured
49/8=6 (nearest whole number)
Answer:
75% bigger
Step-by-step explanation:
Let the first number be x and the second be y.
So:

And:
-----30% less than x
Substitute
in 




Cross multiply


Collect like terms


Make x the subject


So, the average is:




Rewrite as:

Express as percentage

This means that the average is 75% bigger than the second number
Answer:
- Decreasing
Step-by-step explanation:
im not sure of the last two but the others are for sure a no
Answer:
see attached
Step-by-step explanation:
A polynomial is the sum of terms with variables having positive integer exponents. Coefficient numbers need not be integers.
The term 3/x^4 = 3x^-4 is not such a term, so the expression containing it is not a polynomial.