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3 years ago

Please help MATHEMATICS

Mathematics

1 answer:

laila [671]3 years ago

4 0

Answer:

3x+3

Step-by-step explanation:

add up x-3,x+6 and x

combine like terms

x+x+x-3+6=3x+3

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How to multiply 18 3/8 x 1/4

user100 [1]

Decimal Form:
4.59375

Exact Form:
147/32

Mixed Number Form: 4 19/32

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2 years ago

What is the factored form of -7y-y^2=0

Sveta_85 [38]

Factor out like terms
-y(7+y)=0

4 0

3 years ago

In a survey, 150 people were asked if they smoke and whether or not they exercise regularly (more than twice a week). The result

s2008m [1.1K]

(a) 28%

(b) 24%

When calculating the total amount of people it come out to 150.

According to the table 42 people smoke. 42/150 is 28%

According to the table 36 people exercise regularly. 36/150 is 24%

7 0

2 years ago

A local company makes a candy that is supposed to weigh 1.00 ounces. A random sample of 25 pieces of candy produces a mean of 0.

AysviL [449]

Answer:

$n=(\frac{2.58(0.004)}{0.001})^2 =106.50 \approx 107$

So the answer for this case would be n=107 rounded up to the nearest integer

Step-by-step explanation:

Information given

$\bar X= 0.996$ the sample mean

$s=0.004$ the sample deviation

$n =25$ the sample size

Solution to the problem

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =0.001 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

We can use as estimator of the real population deviation the sample deviation for this case $\hat \sigma = s$ / The critical value for 99% of confidence interval is given by $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

$n=(\frac{2.58(0.004)}{0.001})^2 =106.50 \approx 107$

So the answer for this case would be n=107 rounded up to the nearest integer

6 0

3 years ago

Someone please help

emmasim [6.3K]

Answer:

50 pages per hour

Step-by-step explanation:

8 0

3 years ago