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JulsSmile [24]
3 years ago
11

Which statement justifies that x2 + 3x − 1 multiplied by 2x2 − 2x + 1 obeys the closure property of multiplication?

Mathematics
2 answers:
olya-2409 [2.1K]3 years ago
7 0
(x² + 3x - 1)(2x² - 2x + 1)

x²(2x² - 2x + 1) + 3x(2x² -2x + 1) -1(2x² - 2x + 1)
2x^4 - 2x³ + x² + 6x³ - 6x² + 3x - 2x² + 2x - 1
2x^4 - 2x³ + 6x³ + x² - 6x² - 2x² + 3x + 2x - 1
2x^4 + 4x³ - 7x² + 5x - 1

<span>(D)The result 2x4 + 4x3 − 7x2 + 5x − 1 is a polynomial.</span>
Mandarinka [93]3 years ago
6 0

Answer:(D)The result 2x4 + 4x3 − 7x2 + 5x − 1 is a polynomial.

Step-by-step explanation:

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A coffee shop covers it coffee cups for holiday seasons. Their cups are cylindrical, have a 2 inch radius, and a height of 6 inc
slega [8]

Answer:

Surface area of square box cover is 4x12=48in^{2}

Step-by-step explanation:

Given cylindrical cup have 2 in of radius and height of 6 in.

It is said that we need to cover the cup leaving top and bottom of cup.

To find how much material to cover:

After covering the cup, square box will be formed around the cup.

As shown in figure, Top view of square cup and box.

One face of box has length of diameter of cup = 2 in and height of box as height of cup = 6 in

Therefore, Area of one face of square box is length x height = 2 x 6 =12 in^{2}

Since, Box having 4 faces

Surface area of square box cover = 4 x area of one face of box

= 4x12=48in^{2}

8 0
3 years ago
Write an expression that shows 15 more than times 3
Alisiya [41]

Answer:

15>x*3

i don't know what you tried to say but this is what I think the answer is.

5 0
3 years ago
Which equation demonstrates the additive identity property?
Ira Lisetskai [31]

The additive identity property states that for every number a, you have

a+0=a

You're showing this property when you write

(7+4i)+0=7+4i

8 0
2 years ago
Evaluate the following expression 30x^2y x=-2/5 y=5/8
meriva
30(-2/5)²(5/8) = 30*(4/25)*(5/8) = 30*4/(5*8) = 3

8 0
3 years ago
What is the area of a parallelogram with a height of 7 feet and a base of 12 feet?
Vesna [10]

Answer:

84ft^2

Step-by-step explanation:

Relying on formula S(area) =a(base) *h(height )

3 0
3 years ago
Read 2 more answers
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