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Dima020 [189]
4 years ago
12

Kylie explained that (–4x + 9)2 will result in a difference of squares because (–4x + 9)2 = (–4x)2 + (9)2 = 16x2 + 81. Which sta

tement best describes Kylie’s explanation?
A=Kylie is correct.
B=Kylie correctly understood that it is a difference of squares, but she did not determine the product correctly.
C=Kylie did not understand that this is a perfect square trinomial, and she did not determine the product correctly.
D=Kylie determined the product correctly, but she did not understand that this is a perfect square trinomial.
Mathematics
2 answers:
Serjik [45]4 years ago
8 0
The correct product should have been:
<span>(–4x + 9)2 = </span>(-4x)2 + 2(-4x)(9) + 9^2 = 16x6 - 72x +81
The result is a trinomial and not a binomial nor a difference of two squares.

So, the answer is:
C = Kylie did not understand that this is a perfect square trinomial, and she did not determine the product correctly.


Dmitry [639]4 years ago
7 0

Answer: C

Step-by-step explanation: Kyle is not correct because it is not a diference of 2 squares, but a perfect square trinomial.

(-4x + 9)² = (9 - 4x)² = 9² - 2.9.4x + (4x)² = 81 - 72x + 16x²

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The Walden University has 47,456 students in 2010, while Kaplan university had 77,966 students. Complete the following:
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We have been given that The Walden University had 47,456 students in 2010, while Kaplan university had 77,966 students. We are required to compare the number of students in each of these universities in different ways.

(A) Let us first find difference between the number of students between the two universities. The difference between the number of students for two universities is 30510.

Let us now find what percentage is 30510 of 47456.

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Therefore, Kaplan’s enrollment was 64.29% larger than Walden’s

(B) In order to answer this part, we need to find what percentage is 30510 of 77966.

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7 0
4 years ago
The surface areas of two similar solids are 169 m2 and 81 m2. the volume of the larger solid is 124.92 m3. which proportion corr
ikadub [295]

By finding the scale factor, we will see that the volume of the smaller solid is 86.75 m³.

<h3>How to get the volume of the smaller solid?</h3>

If the solids are similar, then there is a scale factor between the two. Then the relation between the areas is equal to the scale factor squared, and the relation between the volumes is equal to the scale factor cubed.

This means that if the areas are 169 m² and 81 m², then we can write:

169 m² = (k²)*81 m²

Solving for k, we get:

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Then if the volume of the large solid is 124.92m³ we can write:

124.92m³ = k³*V

Replacing k and solving for V we get:

124.92m³ = (1.44)³*V

(124.92m³/ (1.44)³) = V = 86.75 m³

If you want to learn more about scale factors:

brainly.com/question/3457976

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