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Vadim26 [7]
2 years ago
5

The mid-point of the straight line joining A(4,-3), B(6,-2) is located at C.

Mathematics
1 answer:
baherus [9]2 years ago
5 0
I hope this helps you

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Which expressions would complete this equation so that it has one solution?
Bad White [126]
Try plugging in the equations
and d are not it because they eliminate x
4x-12=3x-4
x=8
4x-12=6x-18
2x=6
x=3
so both b and c work as answers
4 0
3 years ago
How many sweets can I buy with one euro if I can get six for 20 cent
pogonyaev
1 US Dollar equals 0.95 Euro so you can get 16 sweets.
7 0
3 years ago
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Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through several previews and
balu736 [363]

Answer:

(a) The sample size required is 43.

(b) The sample size required is 62.

Step-by-step explanation:

The (1 - α) % confidence interval for population mean is:

 CI=\bar x\pm z_{\alpha/2}\ \frac{\sigma}{\sqrt{n}}

The margin of error for this interval is:

 MOE=z_{\alpha/2}\ \frac{\sigma}{\sqrt{n}}

(a)

The information provided is:

<em>σ</em> = 4 minutes

MOE = 72 seconds = 1.2 minutes

Confidence level = 95%

α = 5%

Compute the critical value of z for α = 5% as follows:

 z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96

*Use a z-table.

Compute the sample size required as follows:

 MOE=z_{\alpha/2}\ \frac{\sigma}{\sqrt{n}}

       n=[\frac{z_{\alpha/2}\times \sigma}{MOE} ]^{2}

          =[\frac{1.96\times 4}{1.2}]^{2}\\\\=42.684\\\\\approx 43

Thus, the sample size required is 43.

(b)

The information provided is:

<em>σ</em> = 4 minutes

MOE = 1 minute

Confidence level = 95%

α = 5%

Compute the critical value of z for α = 5% as follows:

 z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96

*Use a z-table.

Compute the sample size required as follows:

 MOE=z_{\alpha/2}\ \frac{\sigma}{\sqrt{n}}

       n=[\frac{z_{\alpha/2}\times \sigma}{MOE} ]^{2}

          =[\frac{1.96\times 4}{1}]^{2}\\\\=61.4656\\\\\approx 62

Thus, the sample size required is 62.

3 0
2 years ago
Lee is selling spirit wear for a
rewona [7]

Answer:

Lee sold 16 hats

Step-by-step explanation:

16*8=128

12*12=144

128

+ 144

$272

8 0
2 years ago
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Calculate the length of the hypotenuse
alexira [117]

Answer:

8.60

Step-by-step explanation:

A^2+B^2=C^2

5*5=25    7*7=49    49+25= 74

√ 74=  8.602...

8 0
3 years ago
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