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2 years ago

Mr. Peter charges $2.25 for the usage of laptop for 9 hours. How much Victor needs to pay for 15 hours of usage?

Mathematics

2 answers:

gregori [183]2 years ago

8 0

Answer:

$6.00

Step-by-step explanation:

Well, 2.25 for every 9hrs so we can divide 9 by 2.25 and we will get 40 cents an hour. So 40x15= $6.00

hope im right

Papessa [141]2 years ago

5 0

Answer:

3.75

Step-by-step explanation:

2.25 divided by 9

= 0.25

then

0.25 * 9

= 3.75

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A torch and a battery cost £2.50 altogether. The torch costs £2.00 more than the battery.

Genrish500 [490]

Answer:

$\frac{1}{10}$

Step-by-step explanation:

Let $t$ represent the cost of the torch and $b$ represent the cost of the battery.

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We substitute the second equation into the first equation to get;

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2 years ago

The speed of sound is approximately 340 m / s. How long will it take for the sound to travel from the batter to a spectator who

iris [78.8K]

The first answer is 3/34 sec and the second answer is 15/34 sec.

Set up a proportion for these problems. For the first question,
340/1 = 30/x

Cross multiply:
340*x = 1*30
340x = 30

Divide both sides by 340:
340x/340=30/340
x = 30/340 = 3/34

For the second question,
340/1 = 150/x

Cross multiply:
340*x = 150*1
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Divide both sides by 340:
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2 years ago

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Using the first two points, (0, 12) and (2, 10), we have

m = (10-12)/(2-0) = -2/2 = -1

This means the plane descends 1 km per minute. This means in 3 minutes' time, the plane descends 3 km.

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