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N76 [4]
3 years ago
10

Which soulution to the equation 0.5x+4.2=5.9 Round to the nearest tenth of necessary.

Mathematics
2 answers:
Mice21 [21]3 years ago
4 0
The answer is x=3.4

Hope this helps!! ♡
Have a great day!







Gennadij [26K]3 years ago
3 0
For this you want to solve a 2-step equation

0.5x+4.2=5.9
subtract 4.2 from the left and right sides 
then divide on the left and right sides

x=3.4 (option B)
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Solve 3.8 = p/3 - 7.2.<br><br> p =
laila [671]

Answer:

The answer is p=33.

Step-by-step explanation:

First you need to add 7.2 to the both sides in order to get rid of 7.2. On the left hand side, you'll have 11.0, directly 11. Since, \frac{p}{3} =11 multiply the both sides with 3, and you'll get p=33.

6 0
3 years ago
Describe a real life multiplication situation for which estimate makes sense
Dafna11 [192]

So let's say Patty Ann is planning a party. She invited 17 people. Patty Ann plans on giving each guest 3 pencils. She doesn't know how many people will accept the invite. She also doesnt know if some pencils could be lost. To be on the safe side, she estimates that she will need 60 pencils (20 times 3).

8 0
4 years ago
Determine the sample size needed to construct a 90% confidence interval to estimate the population proportion when p = 0.65 and
WINSTONCH [101]

Answer:

n=170

Step-by-step explanation:

1) Notation and definitions

n random sample taken (variable of interest)

\hat p=0.65 estimated proportion.

p true population

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})

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 90% of confidence, our significance level would be given by \alpha=1-0.90=0.1 and \alpha/2 =0.05. And the critical value would be given by:

z_{\alpha/2}=\pm 1.64

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)  

And on this case we have that ME =\pm 0.06 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

And replacing into equation (b) the values from part a we got:

n=\frac{0.65(1-0.65)}{(\frac{0.06}{1.64})^2}=169.968  

And rounded up we have that n=170

6 0
4 years ago
Need Help please!
cricket20 [7]

3. replace x with 4 and solve:

3(4) - 5 = 12 -5 = 7

The answer is 7

4. Replace x with 6 in the equation for g(x) first:

2(6) -5 = 12-5 = 7

Now replace x with 7 in the equation for f(x)

2(7) +1 = 14 +1 = 15

The answer is 15

4 0
3 years ago
If g(x)=2(x-4), find the value of x if g(x)=20
Softa [21]

Answer:

32.64

Step-by-step explanation:

5 0
4 years ago
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