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REY [17]
2 years ago
14

Х Find the missing y value. у 0 0 1 1 2 -6 3 -9 4-12 5-15

Mathematics
1 answer:
Vika [28.1K]2 years ago
8 0

Answer:

Step-by-step explanation:

3-9 happy to help :)

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A national dental association conducted a survey to find the average (mean) amount of time dentists spend on dental fillings per
eduard

Answer:

The probability of finding a sample mean less than 18 hours is 0.0082

Step-by-step explanation:

To find the probability of finding a sample mean less than 18 hours, we need to calculate the z-score of this sample mean 18. And the probability of finding a sample mean less than 18 hours is P(z<z(18)).

Z-score can be calculated as follows:

z(18)=\frac{X-M}{\frac{s}{\sqrt{N} } } where

  • X is the sample mean (18 hours)
  • M is the average hours dentists spend per week on fillings (20 hours)
  • s is the standard deviation (10 hours)
  • N is the sample size (144)

Putting the numbers, we get:

z(18)=\frac{18-20}{\frac{10}{\sqrt{144} } }=-2.4

Using z- table we can find that P(z<z(18)) = 0.0082

4 0
3 years ago
How to solve the rational equation? (Please include steps not just the answer)
SVETLANKA909090 [29]

1/3 + 1/2 = 1/x

2 and 1/5

    or

3 and 1/4

7 0
3 years ago
Read 2 more answers
How can you subtract fractions with unlike denominators?
Rama09 [41]

Answer:

No, You can't. You have to make their denominators equal!

-\frac{7}{10}

Step-by-step explanation:

So first, you make their denominators equal!

\frac{1*2}{5*2} =\frac{2}{10}=\frac{1}{5}

Multiplying both the numerator and denominator with the same number results in the same fraction, just un-simplified

So, we input it!

\frac{2}{10} -\frac{9}{10} = -\frac{7}{10}

There you go!

Hope you get better at math!(gets wayyyyyyyyyyy...y more complicated later)

Hope this helps!

See Ya!

P.S. Stay Safe!

8 0
3 years ago
Read 2 more answers
The sum of three consecutive even integers is 72. Let x represent the first integer x+2 represent the second integer and x+4 rep
satela [25.4K]

72 = x + x+2 + x+4

72 = 3x+6

66 = 3x

x = 66/3 = 22

1st number = 22

2nd number = 22+2 = 24

3rd number = 22+4 = 26

3 0
3 years ago
A storage container is rectangular and has a length of 15ft and a width of 4ft. It will hold 270 cubic feet of materials. What i
KonstantinChe [14]

Volume of a rectangular prism = l × w × h.

In this case,

V = 270 cubic feet

l = 15 feet

w = 4 ft

h = ?

Plug our values into the volume formula.

270 cubic feet = 15 feet × 4 feet × h.

Simplify the right side

270 = 60 × h.

Divide each side by 60.

4.5 = h

The height is 4.5 feet.

5 0
3 years ago
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