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2 years ago

15

1. Ms. G says that a solution to the equation 2x - 6 = 7x must also be a solution to the equation 5x-6=10x

1 answer:

timama [110]2 years ago

3 0

Answer:

Well......

Step-by-step explanation:

Well if you subtract 2x from 7x, you get 5x. If you subtract 5x from 10x, you get 5x. When you Do that to both formulas, you end up with the same formula: 5x=-6.

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Over which interval is the graph of the parent absolute value function f(x) = |xl decreasing?

Romashka [77]

Answer:

(-∞,0)

Step-by-step explanation:

Graph y=|x|

Note that the graph is shaped like a V. The left half of the graph is decreasing from -∞ up until 0 when it hits the origin and starts to increase. Put this into interval notation: (-∞,0).

8 0

3 years ago

Read 2 more answers

Find the distance d.Assume that the ratio of d to 120 ft is the same as the ratio of 50 ft to 40 ft

dalvyx [7]

Answer:

since it says implied it would be D. assumed

Step-by-step explanation:

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3 years ago

It is known that the population variance equals 484. With a .95 probability, the sample size that needs to be taken if the desir

Ksju [112]

Answer:

We need a sample size of at least 75.

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:

$\alpha = \frac{1-0.95}{2} = 0.025$

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 $1-0.025 = 0.975$ , so $z = 1.96$

Now, we 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.

The standard deviation is the square root of the variance. So:

$\sigma = \sqrt{484} = 22$

With a .95 probability, the sample size that needs to be taken if the desired margin of error is 5 or less is

We need a sample size of at least n, in which n is found when M = 5. So

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

$5 = 1.96*\frac{22}{\sqrt{n}}$

$5\sqrt{n} = 43.12$

$\sqrt{n} = \frac{43.12}{5}$

$\sqrt{n} = 8.624$

$(\sqrt{n})^{2} = (8.624)^{2}$

$n = 74.4$

We need a sample size of at least 75.

6 0

3 years ago

Read 2 more answers

I need to do this now

zhannawk [14.2K]

Answer:

4.55294117. If you want it rounded look below.

Step-by-step explanation:

-Rounded-

Hundredths:4.55

Tenth: 4.6

Thousandth: 4.553

Whole Number: 5

Hope this helps. :D

8 0

2 years ago

What is 549 divided by 67?

andrew11 [14]

549 ÷ 67 = 8.194029851
Hope this helps :)

6 0

2 years ago