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antiseptic1488 [7]
2 years ago
15

A student will be taking a quiz he is underprepared for and will guess every answer. The quiz consists of 10 true/false question

s. Find the probability that he guesses:
Mathematics
1 answer:
3241004551 [841]2 years ago
7 0

Answer:

i say the answer is either 1/2 because true or false or 5/10 because you have a 50/50 chance but im more on the 1/2

Step-by-step explanation:

mark  brainlest please

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34kurt

Answer:

x-2+x+5=18

x+x=18-5+2

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2x/2=15/2

x=15/2 or 7.5

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3 years ago
The vertices of a quadrilateral are listed below.
suter [353]

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D. The quadrilateral is a rhombus.

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(1) A manufacturer of tires believes that their mean time to failure (MTTF) is 20 613 km. They also believe that time to failure
ELEN [110]

Answer:

a) The probability of falling in the warranty period is 11.6%.

b) The warranty period need to be 19771 km to ensure that no more than 5 per cent of tires fail in the warranty period.

Step-by-step explanation:

a) To fall within the warranty period, the tire has to fail before the 20,000 km.

To calculate the probability, we first calculate the z-value:

z=\frac{X-\mu}{\sigma}=\frac{20000-20613}{512}=  \frac{-613}{512}= -1.197

Then, the probability of falling in the warranty period is:

P(X

b) To calculate this we have to go on from a P(z<z₁)=0.05. This happens for z=-1.645.

This corresponds to a value X of:

X=\mu+z*\sigma=20613+(-1.645)*512=20613-842=19771

The warranty period need to be 19771 km to ensure that no more than 5 per cent of tires fail in the warranty period.

5 0
3 years ago
10(x-5)= -80 <br>what is the value of the x​
Fittoniya [83]

Answer:

x = -3

Step-by-step explanation:

10(x-5) = -80

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10x -50 + 50 = -80 + 50

10x = -30

10x ÷ 10 = -30 ÷ 10

x = -3

3 0
2 years ago
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