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2 years ago

12

ILL GIVE BRAINLIEST!!!!!! Please explain!! Thank youuuuu!

2 answers:

Natali5045456 [20]2 years ago

5 0

Answer:

Table D

Step-by-step explanation:

you have to solve .3x = 1.5. this equals 5....since 5 is doubled to 10 you have to double 1.5 to 3.0

prisoha [69]2 years ago

5 0

Answer:

D

Step-by-step explanation:

She is riding the bike at .3 kilometer per minute. All of the tables have 1.5 as the first variable in the y column. To figure out the number of kilometers she travelled in 5 minutes, you have to solve .3x = 1.5. This is equal to 5. Since the number of minutes is doubled from 5 to 10, the answer is also doubled from 1.5 to 3.0

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A quality control expert at LIFE batteries wants to test their new batteries. The design engineer claims they have a variance of

emmainna [20.7K]

Answer:

$z = \frac{981.7 -997}{\frac{62}{\sqrt{73}}}= -2.108$

And we can use the normal standard distribution table or excel and with the complement ruler we got:

$P(z>-2.108) =1- P(z$

Step-by-step explanation:

We know the following info given:

$\mu = 997$ represent the true mean

$\sigma = \sqrt{3844}= 62$ represent the population deviation

$n = 73$ represent the sample size selected

Since the sample size is large enough (n>30) we can use the central limit theorem and the sample mean would have the following distribution:

$\bar X \sim N (\mu, \frac{\sigma}{\sqrt{n}})$

And for this case we want to find this probability:

$P(\bar X >981.7)$

And we can use the z score formula given by:

$z= \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And replacing we got:

$z = \frac{981.7 -997}{\frac{62}{\sqrt{73}}}= -2.108$

And we can use the normal standard distribution table or excel and with the complement ruler we got:

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3 0

2 years ago

The perimeter of the scalene triangle is 54.6 cm. Which equation can be used to find the value of b if side a measures 8.7 cm?

77julia77 [94]

A scalene triangle is a triangle that has 3 sides that are all different lengths.

Let these letters represent the problem:

a = 8.7

b = side 2

c = side 3

P = 54.6

To find the perimeter, we just need to add all the sides [ P = a + b + c ]

So, put what we have in the formula above.

54.6 = 8.7 + b + c

Best of Luck!

7 0

2 years ago

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