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3 years ago

2x + 9 = -7 What does x equal to ?

Mathematics

1 answer:

muminat3 years ago

7 0

Answer:

-8

Step-by-step explanation:

2x + 9 = -7

Subtract 9 from both sides

2x = -16

Divide both sides by 2

x = -8

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If you are told the y-intercept is -4, what is the ordered pair for the y- intercept?

jek_recluse [69]

Answer:

(0,-4)

Step-by-step explanation:

The y-intercept is where the line intersects the y-axis. The y-intercept is written in the form (0,x), where x = y-coordinate/y-intercept. Thus, the answer is (0,-4).

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2 years ago

Select the correct answer.

Galina-37 [17]

Answer:

The answer is C, hope that helps:)

Step-by-step explanation:

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4 years ago

Solve equations for this word problem

o-na [289]

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3 years ago

How do I get the answer

Ronch [10]

Answer:

Step-by-step explanation:

$- |3a + \sqrt{b} |$

By putting the values of a = -4 , b = 9,

$= - |3 \times ( -4) + \sqrt{9} |$

$= - | - 12 + 3|$

$= - | - 9|$

= -(9)

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4 0

3 years ago

A population mean of 360, a standard deviation of 4, and a margin of error of 2.5%

Ad libitum [116K]

Answer:

(351.04, 368.96)

Step-by-step explanation:

Given that population mean= 360

Std devitaion = 4

margin of error = 2.5%= 0.025

Since population std deviation is known we can use Z critical value

For two tailed critical value for 2.5% would be

2.24

Margin of error = ±Critical value*std deviation

= ±2.24(4)

= ±8.96

Confidence interval =(Mean - margin of error, mean + margin of error)

= $(360-8.96, 360+8,.96)\\= (351.04, 368.96)$

3 0

4 years ago