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elena-s [515]
3 years ago
7

What is the opposite reciprocal of -2/3

Mathematics
1 answer:
sveticcg [70]3 years ago
5 0

Answer:

the opposite reciprocal of -2/3 is -3/2

Step-by-step explanation:

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An escalator in a department store is to carry people a vertical distance of 18 feet between floors. How long is the escalator i
melisa1 [442]
Drawing out the triangle, we get the one below. We can use the trigonometric ratio of tan to solve this problem.
tan40= \frac{18}{x}
x= \frac{18}{tan40}
x=21.5

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6 0
2 years ago
Need help ASAP !!!!!
Flura [38]

Answer:

10

Step-by-step explanation:

12x + 20+40 = 180

12x = 120

X = 10

6 0
2 years ago
The probability that a lab specimen contains high levels of contamination is 0.10. A group of 4 independent samples are checked.
galben [10]

Answer:

a) 0.6561

b) 0.2916

c) 0.3439    

Step-by-step explanation:

We are given the following information:

Let us treat high level of contamination as our success.

p = P(High level of contamination) = P(success) = 0.10

n = 4

The, by binomial distribution:

P(X=x) = \binom{n}{x}.p^x.(1-p)^{n-x}\\\text{where x is the number of success}

a) P(No high level of contamination)

We put x = 0, in the formula.

P(X=0) = \binom{4}{0}.(0.10)^0.(1-0.10)^{4} =0.6561

Probability that no lab specimen contain high level of contamination is 0.6561

b) P(Exactly one high level of contamination)

We put x = 1, in the formula.

P(X=1) = \binom{4}{1}.(0.10)^1.(1-0.10)^{3} =0.2916

Probability that no lab specimen contain high level of contamination is 0.6561

c) P(At least one contains high level of contamination)

p(x \geq 1) = 1 - p( x = 0) = 1 - 0.6561 = 0.3439

Probability that at least 1 lab specimen contain high level of contamination is 0.3439

8 0
3 years ago
Find the missing side of each triangle. Round your answers to the nearest tenth if necessary.
navik [9.2K]

Answer:

15.5 because you have to take away some point

Step-by-step explanation:

you can do 15.8 +5.3 and that would make 21 - 15 and makes 6 so you can round 15.8 to 16 and then you subtract to make 10 then you add 5

3 0
2 years ago
Read 2 more answers
I need help please take a look at this
Reika [66]

Answer:

y = x-1

-x+\dfrac32=-y\\\implies y=x-\dfrac32

The equations have the same slope but different y-intercepts. This means the lines are parallel and there is no solution (since they do not intersect).

5 0
2 years ago
Read 2 more answers
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