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stiks02 [169]
3 years ago
14

HURRY IM BEING TIMED

Mathematics
2 answers:
Maru [420]3 years ago
8 0

Answer:

B=39.78

Step-by-step explanation:

Solnce55 [7]3 years ago
6 0

Answer:b

hope this help:)

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Simplify 2(a+5)−3(5a−4)
Nutka1998 [239]

Answer:

-13a+22

Step-by-step explanation:

we have

2(a+5)-3(5a-4)

step 1

Apply the distributive property  both terms

2a+2(5)-3(5a)+3(4)

2a+10-15a+12

step 2

Combine like terms

(2a-15a)+(10+12)

(-13a)+(22)

-13a+22

4 0
3 years ago
Solve 7(-1 + 4x) – 12x = 5. Check your solution.
Rzqust [24]

Answer:

x=\frac{3}{4} or 0.75

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 144 millimeters,
valentinak56 [21]

Answer:

The probability that the sample mean would differ from the population mean by more than 2.6 mm is 0.0043.

Step-by-step explanation:

According to the Central Limit Theorem if we have a population with mean μ and standard deviation σ and appropriately huge random samples (n > 30) are selected from the population with replacement, then the distribution of the sample  means will be approximately normally distributed.

Then, the mean of the distribution of sample mean is given by,

\mu_{\bar x}=\mu

And the standard deviation of the distribution of sample mean  is given by,

\sigma_{\bar x}=\frac{\sigma}{\sqrt{n}}

The information provided is:

<em>μ</em> = 144 mm

<em>σ</em> = 7 mm

<em>n</em> = 50.

Since <em>n</em> = 50 > 30, the Central limit theorem can be applied to approximate the sampling distribution of sample mean.

\bar X\sim N(\mu_{\bar x}=144, \sigma_{\bar x}^{2}=0.98)

Compute the probability that the sample mean would differ from the population mean by more than 2.6 mm as follows:

P(\bar X-\mu_{\bar x}>2.6)=P(\frac{\bar X-\mu_{\bar x}}{\sigma_{\bar x}} >\frac{2.6}{\sqrt{0.98}})

                           =P(Z>2.63)\\=1-P(Z

*Use a <em>z</em>-table for the probability.

Thus, the probability that the sample mean would differ from the population mean by more than 2.6 mm is 0.0043.

8 0
3 years ago
HELP!! correct answer gets brainliest
Llana [10]

Answer:

1/3 I think I did the math and if that's not right try 1/3:1/4 (<--ratio)

Step-by-step explanation:

3 0
3 years ago
What is the distance between (-3, 2) and (2, -1)
MariettaO [177]

Answer:

(5,-3)

Step-by-step explanation:

6 0
3 years ago
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