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Bas_tet [7]
3 years ago
7

Marco wrote the expression (2x − 4y)2 = 4x2 − 16y2. Complete the explanation and correct his error.

Mathematics
1 answer:
andriy [413]3 years ago
3 0

Step-by-step explanation:

Marco may have confused a difference of the squares and the square of a binomial

difference.

He wrote the difference of the squares of the terms instead of the square of a

binomial

difference

The correct answer should be

{4x}^{2}  - 16xy +  {16y}^{2}

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netineya [11]

As a rule of thumb, when each component is selected independently from the same population, the sampling distribution of the sample percentage may be estimated by a regular probability distribution.

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8 0
2 years ago
Solve for y.
Svetradugi [14.3K]
1. For y, I think that refers to the first picture attached. As you can see, each side of the triangle have the same short line drawn across it. It means that they are equal in length. That means the triangle is equilateral, which means each interior angle is 60°. Thus,

60 = 5y + 10
5y = 60 - 10
5y = 50
y = 50/5 =<em> 10</em>

2. As you can see in the second picture attached, Angles B and C are equal. That also means that their respective opposite sides are equal. So,

8x - 4 = 5x + 11
8x - 5x = 11 + 4
3x = 15
x = 15/3 = 5

Consequently,
BC = 4x - 2
BC = 4(5) - 2 = <em>18</em>
4 0
4 years ago
Read 2 more answers
32 ÷_=-4
sasho [114]

Answer:

C or A

Step-by-step explanation:

if I'm wrong then sorry

3 0
3 years ago
A rectangle has a width of 9 units and a length of 40 units. What is the length of a diagonal?
DedPeter [7]
Pythagoras tells us that the diagonal is √(9²+40²) = 41.
Answer C.
3 0
4 years ago
Read 2 more answers
Help with the question above
slega [8]
You got the right answer
3 0
3 years ago
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