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ki77a [65]
2 years ago
13

Quick algebra 1 question for 10 points!

Mathematics
1 answer:
soldier1979 [14.2K]2 years ago
8 0

Using a calculator, the line of best fit for the function is given by:

y = 51.7x - 5.7.

<h3>How to find the equation of linear regression using a calculator?</h3>

To find the equation, we need to insert the points (x,y) in the calculator. For this problem, a linear regression is used because the data only increases.

From the given table, the points are:

(1, 68), (2,97), (3, 134), (4, 176), (5, 241), (6,335).

Inserting these points on the calculator, the line of best fit for the function is given by:

y = 51.7x - 5.7.

More can be learned about a line of best fit at brainly.com/question/22992800

#SPJ1

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There are 350 Families lives in the small town of America. A poll of 50 families revealed the mean annual church contribution is
timofeeve [1]

Answer:

$550+/-$20.79

= ( $529.21, $570.79)

Therefore, the 95% confidence interval (a,b) = ( $529.21, $570.79)

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = $550

Standard deviation r = $75

Number of samples n = 50

Confidence interval = 95%

z(at 95% confidence) = 1.96

Substituting the values we have;

$550+/-1.96($75/√50)

$550+/-1.96($10.60660171779)

$550+/-$20.7889393668

$550+/-$20.79

= ( $529.21, $570.79)

Therefore, the 95% confidence interval (a,b) = ( $529.21, $570.79)

5 0
4 years ago
Find the greatest common factor.<br> 42²x² + 42²x+ 40²<br> Enter the correct answer.
svlad2 [7]

Answer:

4a^2

Step-by-step explanation:

4a^2x^2+4a^2x+4a^2= \\\\4a^2(x^2+x+1)

Therefore, the largest common factor is 4a^2. Hope this helps!

3 0
3 years ago
4. Un cuadrado tiene un área de 400 cm2; si se aumenta un centímetro por lado, ¿cuál será el perímetro del nuevo cuadrado?
CaHeK987 [17]

Step-by-step explanation:

I can't read Spanish or read Spanish I'm sorry

6 0
3 years ago
Someone please help thank you
Leni [432]

Answer:

7:12

Step-by-step explanation:

21 and 36 are both multiples of 3.

3 times 7 is 21, and 3 times 12 is 36.

Now, this ratio becomes: 3 x 7 : 3 x 12

Dividing by 3 on both sides,, we have: 7:12. The ratio 7:12 can't be simplified further, so that's the answer.

Let me know if this helps!

4 0
3 years ago
Read 2 more answers
in 2010 Small Town’s population was 1,759 people. If it’s declining by 2% each year, what would be the population in 2020? how l
BabaBlast [244]
If the population decreases by 2% each year, that can be represented by multiplying the population by 0.98 mathematically.  So if it decreases by 2% each year, an equation we can use is:

P*(0.98)^t,
where P is the current population and t is the number of years.

So in 2020, that would be 10 years from now, so the population would be:

1759*(0.98)^10 = 1437.23
Or about 1437 people.

How long till it is less than 1000?  We can set up an inequality and solve:

1759*(0.98)^t < 1000

(0.98)^t < 1000/1759
t*ln(0.98) < ln(1000/1759)
t > ln(1000/1759)/(ln(0.98))   (swap the sign because ln(0.98) is a negative #)
t > 27.95

So the population would be below 1000 in about 28 years, or 2038.
4 0
3 years ago
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