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Lubov Fominskaja [6]
3 years ago
5

What is an equation of the line that passes through the points (-7, 3) and (-4, 3)?

Mathematics
1 answer:
Verizon [17]3 years ago
8 0

Answer:

Step-by-step explanation:

(3-3)/(-4+7)= 0/3= 0

y - 3 = 0(x + 7)

y - 3 = 0

y = 3

You might be interested in
The mean life of a television set is 119 months with a standard deviation of 14 months. If a sample of 74 televisions is randoml
irina [24]

Answer:

50.34% probability that the sample mean would differ from the true mean by less than 1.1 months

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central limit theorem:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means with size n of at least 30 can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\mu = 119, \sigma = 14, n = 74, s = \frac{14}{\sqrt{74}} = 1.63

If a sample of 74 televisions is randomly selected, what is the probability that the sample mean would differ from the true mean by less than 1.1 months

This is the pvalue of Z when X = 119 + 1.1 = 120.1 subtracted by the pvalue of Z when X = 119 - 1.1 = 117.9. So

X = 120.1

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{120.1 - 119}{1.63}

Z = 0.68

Z = 0.68 has a pvalue of 0.7517

X = 117.9

Z = \frac{X - \mu}{s}

Z = \frac{117.9 - 119}{1.63}

Z = -0.68

Z = -0.68 has a pvalue of 0.2483

0.7517 - 0.2483 = 0.5034

50.34% probability that the sample mean would differ from the true mean by less than 1.1 months

8 0
3 years ago
HELP ME!!! 25 POINTS!!
riadik2000 [5.3K]

Answer:

The total distance walked by Paulo is 3750 feet.

Step-by-step explanation:

Here the four points are<em> (-2,1) (-2,-7) (5,-7) (5,1)</em>

Moving from stop A to B, only the y coordinate changes,

the change is ,

=1-(-7) = 1+7 = 8 units

Moving from stop B to C, only the x coordinate changes,

the change is ,

=5-(-2) = 5+2 = 7 units

Moving from stop C to D, only the y coordinate changes,

the change is

=1-(-7) = 1+7 = 8 units

Moving from stop D to A, only the x coordinate changes,

the change is

=5-(-2) = 5+2 = 7 units

Thus, the total distance traveled is 8+7+8+7 = 30 units

It is given that <em>1 unit = 125 feet</em>

Thus, the total distance traveled is = (125)(30) = 3750 feet

The total distance walked by Paulo is 3750 feet.

3 0
3 years ago
I need a little help here...
lilavasa [31]
So the mean without 894 would be 52.57 
with the 894, the mean would be 157.75
idk what your options are, but there ya go
5 0
3 years ago
Read 2 more answers
Which expression is equivalent to 2/3 (6x − 9y)?
k0ka [10]

Answer:

4x - 6y

Step-by-step explanation:

\frac{2}{3} (6x - 9y) \\  \\  =  \frac{2}{3}  \times 6x -\frac{2}{3}  \times 9y \\  \\  = 2 \times 2x - 2 \times 3y \\  \\  = 4x - 6y \\  is \: equivalent \: expression.

7 0
3 years ago
Can you help me with this question I need the answers,please.
ivolga24 [154]

Answer:

a: 4

b: package and shopping costs

c: 1/2 (   (6-3)/(16-10) )

d: cost of shipping per pound

e: y= 1/2x + 4

f: 92

Step-by-step explanation:

Okay bunch of answers

6 0
3 years ago
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