Answer:
(A) 8y^2 +8y -10
(B) 22y^3 +2y^2 +2y -7
(C) yes, for these polynomials. The result of adding or subtracting the polynomials in this problem is another polynomial, suggesting the set of polynomials is closed to addition and subtraction.
Step-by-step explanation:
A. (4y + 2y^2 − 3) + (−4 + 2y^2 + 2y) + (4y^2 − 3 + 2y)
= y^2(2 +2 +4) +y(4 +2 +2) +(-3 -4 -3)
= 8y^2 +8y -10 . . . . total length of sides 1, 2, 3
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B. The length of the 4th side is the difference between the perimeter and the sum of the other three sides:
(22y^3 + 10y^2 + 10y − 17) -(8y^2 +8y -10)
= 22y^3 +y^2(10 -8) +y(10 -8) +(-17 +10)
= 22y^3 +2y^2 +2y -7 . . . . length of 4th side
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C. The result of adding or subtracting the polynomials in this problem is another polynomial, suggesting the set of polynomials is closed to addition and subtraction. An example is not a proof, but there is nothing about this example that would suggest a different conclusion.
Answer:
The president is using the mode because it is the most obvious answer. The fans are using the iconic mean which is the middle number of the data set. They can be different because different people think of numbers differently.
Step-by-step explanation:
Make 7% a decimal:7÷100=0.07. Now multiply:0.07×2.99=0.2093.
7% of 2.99 is 0.2093.
The answer is B hope this helps