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3 years ago

6

When you square each side of an equation, is the resulting equation equivalent to the original?

1 answer:

Marina CMI [18]3 years ago

4 0

It is not equivalent to the original

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Unoccupied seats on flights cause airlines to lose revenue. Suppose a large airline wants to estimate its average number of unoc

Len [333]

Answer: 3

Step-by-step explanation:

Given : Standard deviation : $\sigma=4.1\text{ seats}$

Margin of error : $E=\pm5\text{ seats}$

Significance level : $\alpha: 1-0.95=0.05$

By using the standard normal table of z ,

Critical value : $z_{\alpha/2}=1.96$

The formula we use to find the minimum sample size required :-

$n=(\dfrac{z_{\alpha/2}\ \sigma}{E})^2$

i.e. $n=(\dfrac{(1.96)(4.1)}{5})^2=2.58309184\approx3$

Hence, the number of lights should we select if we wish to estimate μ to within 5 seats and be 95 percent confident =3

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3 years ago

Round 44.057 to the nearest hundredth.

AlekseyPX

Answer:

44.057 to nearest hundredth

44.06

5 0

3 years ago

A car bought from a dealership depreciates in value every year by 4.1% of what it's worth at the start of that year. It is initi

Natasha2012 [34]

To find the depreciation of the car take the amount it goes down by each year (4.1%) and make x the number of years. 34000 · (4.1% · 7) = 9758. That's your depreciation. Now just subtract the depreciation from the total and you get 24242

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3 years ago

Helpppppppppppppppppppppppp

kupik [55]

Answer:

$360\ cm^2$

Step-by-step explanation:

<u>Step 1: Determine the area of the bottom rectangle</u>

$A = l * w$

$A = 10\ cm * 12\ cm$

$A = 120\ cm^2$

<u>Step 2: Determine the area of the back rectangle</u>

$A = l * w$

$A = 10\ cm * 5\ cm$

$A = 50\ cm^2$

<u>Step 3: Determine the area of the top rectangle</u>

$A = l * w$

$A = 10\ cm * 13\ cm$

$A = 130\ cm^2$

<u>Step 4: Determine the area of the triangle</u>

$A = \frac{h*b}{2}$

$A = \frac{5\ cm * 12\ cm}{2}$

$A = \frac{60\ cm^2}{2}$

$A = 30\ cm^2$

<u>Step 5: Determine the surface area</u>

$120\ cm^2 + 50\ cm^2 + 130\ cm^2 + 2(30\ cm^2)$

$360\ cm^2$

Answer: $360\ cm^2$

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3 years ago

What is the inverse of the function f(x) = 2x+1

Lana71 [14]

Answer:

$f(x)=\frac{x-1}{2}$

8 0

3 years ago