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3 years ago

Subtract.

2 answers:

6 0

Hey Emily070505097,

Lets solve your problem step by step.

$
(-9.6x+7)-(7.3x-9)
$

To solve the problem we have to follow the PEMDAS order of operations.

 $\left(-9.6x+7\right)-\left(7.3x-9\right)$

 First, we have to remove the parenthesis.

⇒ $-9.6x+7-\left(7.3x-9\right)$

⇒ $-9.6x+7-7.3x+9$

 Now we have to group like terms

⇒ $-9.6x-7.3x+7+9$

 Next we have to add similar elements

⇒ $-16.9x+7+9$

⇒ $-16.9x+16$

Hope this helps,

AnthrαX

pantera1 [17]3 years ago

3 0

-16.9x + 16 is the correct answer

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HELP ME PLEASE!! ASAP!!

Levart [38]

The total area is given by:
A1 = (300) * (500)
A1 = 150000 feet ^ 2
The area occupied by 5 people is:
A2 = (5) * (5)
A2 = 25 feet ^ 2
Then, we can make the following rule of three:
5 --------> 25
x --------> 150000
Clearing x we have:
x = (150000/25) * (5)
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Answer:
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3 0

3 years ago

How do i do this? Its confusing

cestrela7 [59]

Answer:

$12,415.48

Step-by-step explanation:

A = P (1 + r/n)^(nt)

where A is the final amount,

P is the initial amount,

r is the annual interest rate as a decimal,

n is the number of compoundings per year,

and t is the number of years.

A = 8000 (1 + 0.152/2)^(2×3)

A = 8000 (1.076)^6

A = 12415.48

5 0

3 years ago

Solve 2/3+5/6 and put answer in simplest form A)3/2 B)9/6 C)7/6 D)2/3

Mice21 [21]

It would be 9/6 which simplifies to 3/2

5 0

3 years ago

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estim

pogonyaev

Answer:

$n=\frac{0.5(1-0.5)}{(\frac{0.025}{1.28})^2}=655.36$

And rounded up we have that n=656

Step-by-step explanation:

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 80% of confidence, our significance level would be given by $\alpha=1-0.80=0.20$ and $\alpha/2 =0.10$ . And the critical value would be given by:

$z_{\alpha/2}=\pm 1.28$

Solution to the problem

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

Since we don't have prior info for the proportion of interest we can use $\hat p=0.5$ as estimator. And on this case we have that $ME =\pm 0.025$ and we are interested in order to find the value of n, if we solve n from equation (a) we got: