3 years ago

I have a brain and I know most of you are using brainly to cheat in school

Mathematics

1 answer:

maxonik [38]3 years ago

5 0

Brainly should be used to ask questions and get answers. But you still should figure out and practice how to do it.

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3x - 8 - 15x = a(2 - x)

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Answer:

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3 years ago

The quality control manager of a light bulb factory needs to estimate the average life of a large shipment of light bulbs. The p

eimsori [14]

Answer:

b) yes

The manufacturer has the right to state that the light bulbs last on average 400 hours

Step-by-step explanation:

Explanation:-

Given sample size 'n' = 64

Given standard deviation of the Population (σ)=100

Mean of the sample (x⁻) = 350 hours

95% of confidence interval is determined by

$(x^{-} -Z_{0.95} \frac{S.D}{\sqrt{n} } , x^{-} +Z_{0.95} \frac{S.D}{\sqrt{n} } )$

( $(350 -1.96 \frac{100}{\sqrt{64} } , 350+1.96\frac{100}{\sqrt{64} } )$

(350-24.5 , 350+24.5)

(325.5 , 374.5)

Conclusion:-

Yes

The manufacturer has the right to state that the light bulbs last on average 400 hours

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3 years ago

Explain answer !! ( WILL GIVE BRAINLEST)

kicyunya [14]

Answer:

25-7

Step-by-step explanation:

"Substitute for": Replace x with ____

Since it is given that x = 25 -y, we can replace the x in 5x + y = 10 with 25 - y by the substitution property of equality.

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Tim ran a quarter mile five times yesterday the table above shows the time of each run in minutes and seconds. For example the t

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Honestly im not even sure lol

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