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2 years ago

Select ALL the correct answers.

Mathematics

1 answer:

jolli1 [7]2 years ago

4 0

Answer:

(4x+5)(-3x-1) = -12x²-19x-5

Option A:

(-16x² + 10x - 3) + (4x² - 29x - 2) = -12x²-19x-5

Option A is correct.

Option B:

3(x - 5) - 2(6x² + 9x + 5) = -12x²-15x-25

Option B is wrong.

Option C:

2(x - 1) - 3(4x² + 7x + 1) = -12x²-19x-5

Option C is correct.

Option D:

(2x² - 11x - 9) - (14x² + 8x - 4) = -12x²-19x-5

Option D is correct.

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By switching service providers , a family's telephone bill decreased from about $ 50 a month to about 44 . What was the percent

anyanavicka [17]

Answer:

12% decrease

Step-by-step explanation:

50 - 44 = 6

6/50 = 0.12 or 12% decrease

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2 years ago

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d1i1m1o1n [39]

Answer:

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2 years ago

Select the figure that would be next in the pattern below.

marissa [1.9K]

A because the difference between them is 1 but started at 2 and every time u add an extra 1

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2 years ago

What is the mean absolute deviation?

Lostsunrise [7]

Answer:

0.8 cm

Step-by-step explanation:

The formula for MAD is attached in the picture.

x_i are the values (data)

x bar is the mean

n is the number of numbers (data)

For figuring out MAD, basically, <em>we subtract the mean from each of the values respectively and take the absolute value and SUM for all of the numbers in the data set. Then we divide by n, the number of numbers.</em>

<em />

Let's do this:

MAD = $\frac{|2-3|+|2-3|+|2-3|+|2-3|+|3-3|+|3-3|+|3-3|+|4-3|+|4-3|+|5-3|}{10}\\=\frac{1+1+1+1+0+0+0+1+1+2}{10}\\=\frac{8}{10}=0.8$

MAD is 0.8

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3 years ago

Four times a number decreased by 13 minus 2 times the same number is 9. What is the number?

Flura [38]

Answer:

The number is 59

Step-by-step explanation:

13×4-2+9=59

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2 years ago