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Sergio [31]
1 year ago
10

Solve th simultaneous equations 3x + y = 17 2x +y = 12

Mathematics
1 answer:
nydimaria [60]1 year ago
6 0

Answer:

I can't I'm blind and Def

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To estimate the mean of a population with unknown distribution shape and unknown standard deviation, we take a random sample of
Naddika [18.5K]

Answer:

t_{critical} = \pm 1.7793                        

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 64

Sample mean = 22.3

Sample standard deviation = 8.8

We want to estimate 92% confidence interval.

92% Confidence interval:  

\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}  

Putting the values, we get,

Degree of freedom = n - 1 = 63

t_{critical}\text{ at degree of freedom 63 and}~\alpha_{0.01} = \pm 1.7793  

22.3 \pm 1.7793(\dfrac{8.8}{\sqrt{64}} ) = 22.3 \pm 1.95723 = (20.34,24.26)

7 0
3 years ago
Find the equation of a line that passes through (0,0) that is perpendicular to 2x+3y=-6
Dovator [93]

The slope-intercept form of a line:

y=mx+b

m - slope

b - y-intercept

Convert 2x + 3y = -6 to the slope-intercet form:

2x+3y=-6         <em>subtract 2x from both sides</em>

3y=-2x-6         <em>divide both sides by 3</em>

y=-\dfrac{2}{3}x-2

Let k:y=m_1x+b_1 and l:y=m_2x+b_2

l\ \perp\ k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}

We have m_1=-\dfrac{2}{3}

Therefore

m_2=-\dfrac{1}{-\frac{2}{3}}=\dfrac{3}{2}

We have the equation of a line:

y=\dfrac{3}{2}x+b

Put the coordinates of the point (0, 0) to the equation:

0=\dfrac{3}{2}(0)+b

0=b\to b=0

Answer: \boxed{y=\dfrac{3}{2}x}


8 0
3 years ago
I xant solve for the value of K
exis [7]
K = -3x^2/5 -5x -3 + px/5. I hope that helps.
4 0
3 years ago
Find the value of c that completes the square.<br> n2- 26n + c
saul85 [17]

Step-by-step explanation:

b^2=4ac

b= -26, a=1, c=?

-26^2=4*1*c

676=4c

c=676/4

c=169

4 0
3 years ago
Need help for math homework!!
Rasek [7]

Answer:

B

Explanation:

Matches all the points on the graph

5 0
3 years ago
Read 2 more answers
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