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ArbitrLikvidat [17]
3 years ago
13

28. (-2,-2) perpendicular to -5x + 2 = 3y - 9

Mathematics
1 answer:
lyudmila [28]3 years ago
4 0
So the gradient is the negative reciprocal of the question so first you have to rearrange the equation into the form y = mx + c so you get 3y = - 5 x + 11 and then y = -5/3 x + 11/3. Now to find the gradient of the line perpendicular to it you do the negative reciprocal and get 3/5 x so now you have the equation y = 3/5 x + c . Now simply substitute your coordinate into the equation to get -2 = 3/5 x -2 + c and 3/5 x -2 is -1.2 so now you have 2 = -1.2 + c so c is 3.2 so your final equation is y = 3/5 x + 3.2 hope this helps :)
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8 0
3 years ago
The following information is obtained from two independent samples selected from two normally distributed populations.
AysviL [449]

A. The point estimate of μ1 − μ2 is calculated using the value of x1 - x2, therefore:

μ1 − μ2 = x1 – x2 = 7.82 – 5.99

μ1 − μ2 = 1.83

 

B. The formula for confidence interval is given as:

Confidence interval = (x1 –x2) ± z σ

where z is a value taken from the standard distribution tables at 99% confidence interval, z = 2.58

and σ is calculated using the formula:

σ = sqrt [(σ1^2 / n1) + (σ2^2 / n2)]

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σ = 0.988297

 

Going back to the confidence interval:

Confidence interval = 1.83 ± (2.58) (0.988297)

Confidence interval = 1.83 ± 2.55

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3 0
3 years ago
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Orlov [11]

Answer:

angle BAD = 180 -2x

angle BCD = x                                                    given

angle BCD is an inscribed angle                      

angle DOB = 2 (angle BCD)                              

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5 0
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vodomira [7]

Answer:

Answer is a

Step-by-step explanation:

it is the only answer that makes sense

7 0
2 years ago
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Mariulka [41]
Your equation is already in one of the standard form. Specifically, the slope intercept form.

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Start with the intercept y= 2, the point (0,2).

A slope of 3 would give you (1,5) as a second point for your line.

Get a ruler and draw a line through the two points.
6 0
2 years ago
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