Answer:
2x and 7y, because they have different variables.
Step-by-step explanation:
Answer:
The polynomial of minimum degree is
.
Step-by-step explanation:
According to the statement, we appreciate that polynomial pass through the following points:
(i)
, (ii)
, (iii)
, (iv) 
From Algebra we know that any n-th grade polynomial can be constructed by knowing n+1 different points. Hence, the polynomial of minimum degree is a quartic function. The polynomial has the following form:

We proceed to expand the expression until standard form is obtained:




If we know that
, then:



Then, the polynomial is:



The polynomial of minimum degree is
.
Reflection acrossed the y axis
Answer:
(351.04, 368.96)
Step-by-step explanation:
Given that population mean= 360
Std devitaion = 4
margin of error = 2.5%= 0.025
Since population std deviation is known we can use Z critical value
For two tailed critical value for 2.5% would be
2.24
Margin of error = ±Critical value*std deviation
= ±2.24(4)
= ±8.96
Confidence interval =(Mean - margin of error, mean + margin of error)
=