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Mandarinka [93]
3 years ago
8

Simplify and determine the coefficient of (-2/5x) (5y) (-2x)

Mathematics
2 answers:
slamgirl [31]3 years ago
7 0
The answer is 4 x^2y. <em> I cannot explain to you how I know I'm right. I'm the type of person who HAS to do the work in their head . I am a very experienced person in any Mathematics area. I am NOT saying I'm an expert , but it is one of my strongest subjects . </em>

AfilCa [17]3 years ago
4 0

Answer:

4y

Step-by-step explanation:

Parenthesis means they are multiplied , so writing all the top(numerator) values in top and bottom(denominator) values in bottom we get

\frac{-2*5y*(-2x)}{5x}

simplify by cancelling the common factor 5 and x from top and bottom

we get

4y

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3 years ago
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What is the area of a square if the length is 4x-3
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Answer:

The area  of square in terms of x = 16x² -24x + 9

Step-by-step explanation:

It is stated in the question that the length of a square = 4x - 3

Formula to find the area of the square is

Area = length²

Area = ( 4x - 3 )²

by using ( a - b )² = a² + b² - 2ab

here a = 4x and b = -3

So,

(4x)² + (-3)² - 2(4x)(3)

16x² + 9 - 2(12x)

16x² + 9 - 24x

16x² -24x + 9

The area  of square in terms of x = 16x² -24x + 9

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3 years ago
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You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly more than 47%. With Ha : p
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Answer:

The p-value is 0.0229

Step-by-step explanation:

With H_{a}: p > 0.47 we have an upper-tail alternative. Because the p-value is defined as the probability of getting a value at least as extreme as the value observed. The observed value is given by the test statistic z = 1.997 which comes from a standard normal distribution. Therefore, we compute the p-value in the following way P(Z > 1.997) = 0.0229, i.e., the p-value is 0.0229

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What is the factored form of the expression?
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Answer: The answer is (d) (4x+7)(7x+8).


Step-by-step explanation: Given equation to be factored is

28x^2+81x+56.

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x^2+(a+b)x+ab=(x+a)(x+b).

So, the given equation can be factorised using the above rule. The factorisation is as follows.

28x^2+81x+56\\\\=28x^2+49x+32x+56\\\\=7x(4x+7)+8(4x+7)\\\\=(4x+7)(7x+8).

Thus, the correct option is (d).





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3 years ago
The coordinates of point A on a coordinate grid are (−2, −3). Point A is reflected across the y-axis to obtain point B and acros
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Answer:

B) B(2,-3) and C(-2,3)

Step-by-step explanation:

The given point A, has coordinates (-2,-3).

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Therefore B will have coordinates (2,-3).

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Hence the coordinates of C are (-2,3)

3 0
3 years ago
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