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NNADVOKAT [17]
3 years ago
9

The table shows the median home prices in Florida. What is the equation of a trend line that models a relationship between time

and home prices? Use the equation to predict the median home price in 2020.
Year
1940
1950
1960
1970
1980
1990
2000
Median Price($)
$20,200
$39,900
$50,400
$62,800
$89,100
$98,700
$119,000

A. y = 1646.67x + 20,200; $151,900

B. y = 49.4x + 20,200; $119,000

C. y = 49.4x + 20,200; $151,900

D. y = 1646.67x + 20,200; $119,000
Mathematics
1 answer:
MrMuchimi3 years ago
4 0
<span>A. y = 1646.67x + 20,200; $151,900
</span>
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What is the percentage increase if your salary from$85 to $100 per week round to the nearst percent
natali 33 [55]
To find what percent of something something is you first divide the part by the whole (85/100=0.85) and then multiply that by 100 (0.85 * 100=85) this means you get 85%
6 0
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5<br><br> ——<br> ——<br><br><br> i need help!!<br><br><br> ————-<br> math geniuses pls help me!
34kurt

Answer:

C

Step-by-step explanation:

  x = 7 cos (2pi/3)            y =  7 sin (2pi/3)

  x = -7/2                          y = 7 sqrt(3) /2

5 0
1 year ago
I WILL GIVE BRAINLIEST PLEASE HELP!!!
Rudik [331]

Answer:

1/x+2

Step-by-step explanation:

To find the inverse of the function, try switching the x value with the y value or function value

something like: x=1/g(x)-2

then, just manipulate the equation so that g(x) is by itself again, but this time, since it is an inverse, it's denoted as g-1(x)

x=1/g-1(x)-2

x+2=1/g-1(x)

(g-1(x))(x+2)=1

g-1(x)=1/(x+2)

7 0
3 years ago
A random sample of 85 sixth-graders in a large city take a course designed to improve scores on a reading comprehension test. Ba
BartSMP [9]

Answer:

12.6 < \mu < 14.8

For this case we can find the margin of error like this:

ME= \frac{14.8-12.6}{2}= 1.1

Since we need to divide the width of the interval by 2.

And now with the margin of error we can find the sample mean with any of the two following ways:

12.6 +1.1=13.7

14.8-1.1=13.7

So for this case the correct answer would be:

A. Sample Mean = 13.7; Margin of Error = 1.1

Step-by-step explanation:

Previous concepts

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".  

Solution to the problem

The confidence interval for the mean is given by the following formula:  

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}} (1)  

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:  

df=n-1=85-1=84

We know that the confidence interval is given by:

12.6 < \mu < 14.8

For this case we can find the margin of error like this:

ME= \frac{14.8-12.6}{2}= 1.1

Since we need to divide the width of the interval by 2.

And now with the margin of error we can find the sample mean with any of the two following ways:

12.6 +1.1=13.7

14.8-1.1=13.7

So for this case the correct answer would be:

A. Sample Mean = 13.7; Margin of Error = 1.1

3 0
2 years ago
A line contains the points (−26, −37)(−26, −37) and (−32, −61)(−32, −61) . What is the slope of the line in simplified form?
Rus_ich [418]
Slope = (y2 - y1)/(x2 - x1) = (-61 - (-37))/(-32 - (-26)) = (-61 + 37)/(-32 + 26) = -24/-6 = 4

Therefore, slope = 4
3 0
3 years ago
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