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Mama L [17]
3 years ago
7

A taxi fare is $3 and then $0.40 for every kilometre. A taxi fare is $9 . How far has the taxi travelled?

Mathematics
1 answer:
Charra [1.4K]3 years ago
8 0

Answer:

y = 3 + 0.40x

Step-by-step explanation:

Fixed cost of taxi fare = $3

Additional cost = $0.40

Let

y = Total cost

x = number of kilometers

The equation:

Total cost = Fixed cost of taxi fare + (Additional cost * number of kilometers)

y = 3 + 0.40x

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5y + 6 - 10y  -  3 \\  - 5x + 3
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Calculate the frequency of a wave with a speed of 250m/s and a wavelength of 50m.
WARRIOR [948]

Answer:

<h3>formulas</h3>

<em><u>frequency</u></em><em><u>=</u></em><em><u>spee</u></em><em><u>d</u></em><em><u>/</u></em><em><u>wavele</u></em><em><u>ngth</u></em>

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7 0
3 years ago
The Marriott Hotel charges $150 per night for a family
SVETLANKA909090 [29]

Answer:

For two night in the hotel, you would pay $333 (including tax)

Step-by-step explanation:

Without tax, the price for 2 nights would be $150 times 2. So the price without tax would be....

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But then we have to be aware of 11% tax so we would multiply the price for two nights by 1.11 and get...

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3 years ago
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How do i do this? i’m having trouble
Fantom [35]

Answer:

121

Step-by-step explanation:

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6 0
3 years ago
In a study of 250 adults, the mean heart rate was 70 beats per minute. Assume the population of heart rates is known to be appro
pantera1 [17]
The z score for a confidence level of 99% is 2.575.. You need to know this to complete this type of problem.. the other two commonly used confidence levels are 90% and 95% having z scores of 1.645 and 1.96 respectively. You need to memorize this!

To find the confidence interval, it will be defined as the sample mean plus/minus the margin of error.. Now to find the margin of error, divide the standard deviation of 12 by the square root of the number of elements in your sample(√250). Then take that result and multiply it by the Z score I mentioned above for a 99% confidence level.


In this case: the sample mean is 70 and the margin of error is approximately 1.95

So to calculate the confidence interval, do the following:
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Looks like that would be the last choice. hope this helps.. it's been awhile since my work with statistics :-)
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