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3 years ago

What is the coefficient of the second term in this expression? 7 + 2n

Mathematics

1 answer:

Anastasy [175]3 years ago

3 0

Answer:

a2 = 11

Step-by-step explanation:

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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

4 0

3 years ago

60 inches to 38 inches

Anna [14]

You can subtract 22 inches.

3 0

3 years ago

How do I get this answer

AveGali [126]

The answer you are looking for would be X=10 because as the bottom triangle has 12 for bottom and 13 from top the top is off by 3 for both of them you just subtract by 3 and 12-3=9 and 13-3=10 plz give brainliest

4 0

3 years ago

PLEASE HELP ME I BEG I REALLY NEED HELP WITH THIS PROBLEM!

lozanna [386]

Area = length x width

x² + 12x = l * x

A.

First, you factor x from x² + 12x

$x^{2} +12x=x(x+12)$

area = x (x+12)

area = (x+12) * x

Length = x + 12

B.

If x = 10,
l = x + 12 = 10 +12 = 22
length = 22
and
Area = x² + 12x = 10² + 12(10) = 100 + 120 = 220
area = 220

Hope this helps :)

6 0

3 years ago

What is 200 divides buy 2/4th's

Tcecarenko [31]

Answer:

400

Hope this helps!

8 0

3 years ago