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3 years ago

How can you use subtraction to describe division?

1 answer:

6 0

Division is repeated subtraction. By subtracting a number multiple times, you see how many times it can go in to a number, therefore you are dividing.

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What the image of (- 6, 5) after a reflection over the line y = x ?

zubka84 [21]

Answer:

Step-by-step explanation:

7 0

3 years ago

The life in hours of a 75-watt light bulb is known to be normally distributed with standard deviation σ = 25 hours. A random sam

irina [24]

Answer: a) (1008.34,1019.658) b) (1009.24,1018.76)

Step-by-step explanation:

Since we have given that

n = 75

mean = 1014 hours

Standard deviation = 25 hours

At 95% two sided , z = 1.96

So, confidence interval would be

$\bar{x}\pm z\dfrac{\sigma}{\sqrt{n}}\\\\=1014\pm 1.96\dfrac{25}{\sqrt{75}}\\\\=1014\pm 5.658\\\\=(1014-5.658,1014+5.658)\\\\=(1008.34,1019.658)$

(b) Construct a 95% lower confidence bound on the mean life.

z = 1.65

So, confidence interval would be

$\bar{x}\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1014\pm 1.65\times \dfrac{25}{\sqrt{75}}\\\\=1014\pm 4.76\\\\=(1014-4.76,1014+4.76)\\\\=(1009.24,1018.76)$

Hence, a) (1008.34,1019.658) b) (1009.24,1018.76)

4 0

4 years ago

What is the value of m in this equation -4(m+6)=-8

Darina [25.2K]

-4m-24=-8
(add 24 to both sides)
-4m=16
(divide by -4 on both sides)
m=-4

8 0

4 years ago

Read 2 more answers

The number shown above belongs to which of the following subsets of the real numbers?

Nookie1986 [14]

Answer:

Rational

Step-by-step explanation:

the rational number subset contains fractions

3 0

4 years ago

Read 2 more answers

WILL GIVE BRAINLIEST FOR CORRECT ANSWER!

svp [43]

Heya friend !!

During water cycle , Water in liquid state absorbs tremendous amounts of incoming solar energy causing it to evaporate and it is released back in the atmosphere while the formation of clouds during Condensation .

Hence , We got our answer as D.

Hope it helps you :)

5 0

4 years ago