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attashe74 [19]
3 years ago
5

Q, S, T, and U are coplanar: true or false? Why?

Mathematics
1 answer:
inysia [295]3 years ago
7 0
I think it would be true because they are crossing
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A kids skipping rope is 7ft long. How many ropes could I cut from a 10 yard long piece of rope?
Hatshy [7]
3 feet are in one yard
so 3 ×10 =30
so 30 ÷ 7 = 4.2
Answer is 4
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7 0
3 years ago
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
CHECK MY ANSWER?!
MrRissso [65]
First degree polynomial w two terms. a polynomial means there is more than one term and 2x is one term and 8 is the other :) hope this helped
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3 years ago
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Please help me with this question<br><br> Calculate.<br><br> 7.75% of $9,000 = ___ $
andrezito [222]

The answer would be $697.5

Hope this helps!

3 0
3 years ago
Evaluate using inverse operations...<br><br> 9x + 8 = 27
melomori [17]

Answer:

9x+8=27

9x=27_8

9x=19

9 9

x=2.111111111111

5 0
2 years ago
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