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3 years ago

I really need help I don't know what to do I pay attention but don't understand

Mathematics

1 answer:

mrs_skeptik [129]3 years ago

6 0

It means like what number equals that number.Use multiplication to figure these out.

Example : 9,15. Factors for 9-9,1,3 .Factors for 15-1,15,3,5

Hope this helps !

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Initially, there were equal amount of roses and tulips at a store. Each bouquet was made with 3 roses and 4 tulips. After the bo

adelina 88 [10]

Answer:There were 10 bouquets of roses made and 4.5 bouquets of tulips made

Step-by-step explanation:

8 0

3 years ago

Can someone help me

mr Goodwill [35]

X=4
cross multiply
3x=12
x=4

7 0

2 years ago

Read 2 more answers

The population standard deviation for the typing speeds for secretaries is 4 words per minute. If we want to be 90% confident th

Oksana_A [137]

Answer:

The minimum sample size that should be taken is 62.

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.

If we want to be 90% confident that the sample mean is within 1 word per minute of the true population mean, what is the minimum sample size that should be taken

This is n when $M = 1, \sigma = 4$ . So

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

$1 = 1.96*\frac{4}{\sqrt{n}}$

$\sqrt{n} = 4*1.96$

$(\sqrt{n})^{2} = (4*1.96)^{2}$

$n = 61.5$

The minimum sample size that should be taken is 62.

8 0

3 years ago

Which of the following options best describes the function graphed below?

hodyreva [135]

C.
The graph looks like it’s linear and is trending in an increasing way.

6 0

2 years ago

23 and 24 I need help please

Gnoma [55]

Answer:

They should purchase the snack with the purple box. This is the answer for 23, i don't know what 24 is sorry.

Step-by-step explanation:

24÷3=8

8×5=40

so the first snacks would cost them $40.

then:

24÷4=6

6×6=36

so the second snacks would cost them $36

5 0

3 years ago