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3 years ago

Find the slope and y-intercept? Please help y = -2x - 1

Mathematics

2 answers:

disa [49]3 years ago

8 0

Answer:

Answer: Slope is -2 and y int: -1

Step-by-step explanation:

Step-by-step explanation: y=mx+b is the formula for finding slope & y intercept.

PtichkaEL [24]3 years ago

3 0

Answer: Slope is -2 and y int: -1

Step-by-step explanation: y=mx+b is the formula for finding slope & y intercept.

It was in your equation m=-2 and -1 being y intercept

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Erik buys 2.5 pounds of cashews.If each pound of cashews $7.70,how much will he pay for the cashews???I put Erik will pay $49250

Fittoniya [83]

The answer should be $ 19.25. All you have to do is $7.70 * 2.5 which = $19.25

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What is the slope of the line through (3,2) and (-3,4)?

NISA [10]

Answer:

slope = - $\frac{1}{3}$

Step-by-step explanation:

calculate the slope m using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (3, 2 ) and (x₂, y₂ ) = (- 3, 4 )

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2 years ago

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Find equations for those tangent lines to<br> the graph of<br> y = x − 3/x

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Step-by-step explanation:

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3 years ago

Line segment AB has endpoint A locates at the origin. Line segment AB is longest when the coordinates of B are

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3 years ago

You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you beli

zhuklara [117]

Answer:

We need to sample at least 1069 parents.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

How many parents do you have to sample?

We need to sample at least n parents.

n is found when $M = 4, \sigma = 79.5$ . So

$M = z*\frac{\sigma}{\sqrt{n}}$

$4 = 1.645*\frac{79.5}{\sqrt{n}}$

$4\sqrt{n} = 1.645*79.5$

$\sqrt{n} = \frac{1.645*79.5}{4}$

$(\sqrt{n})^{2} = (\frac{1.645*79.5}{4})^{2}$

$n = 1068.92$

Rounding up

We need to sample at least 1069 parents.

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