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e-lub [12.9K]
3 years ago
7

a car can complete a journey of 300 km with a speed of 60 km per hour I) how much does it take the to complete the journey and w

hat is the speed of the car if it covers only 200 km in the same interval of time ​
Mathematics
1 answer:
Verdich [7]3 years ago
6 0

Step-by-step explanation:

First step:

Distance = 300km

Speed = 60km/hr

We know,

Using Speed = Distance ÷ Time

Time = Distance ÷ Speed

we have Total Time = 300÷60

Total Time = 5hr

Again,

Distance = 200km. (Time = 5hr,

Speed =? Distance = 200)

Speed = Distance÷ Time

= 200÷5

= 40km/hr

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3 years ago
The credit remaining on a phone card (in dollors) is a linear function of the total calling trime made with the card ( in minute
KATRIN_1 [288]

After 85 minutes of calls, there are $27.25 left on the card.

<h3>What is the remaining credit after 85 minutes of calls?</h3>

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y = a*x + b

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In this case, we know that the line passes through the points (22, 36.7) and (52, 32,20)

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So the slope is:

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36.7 = -0.15*22 + b

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y = -0.15*x +40

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If you want to learn more about linear equations:

brainly.com/question/1884491

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7 0
2 years ago
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Sati [7]

Answer:

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-4^2

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2.

(-4)^2

we know:

4^2 = 4 \times 4 = 16

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we know:

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3 years ago
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</span>
3 0
3 years ago
Read 2 more answers
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