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Oduvanchick [21]
3 years ago
6

A cyclist travels at 10 km/hr for 2 hrs and then at 20 km/hr for 1 hr. Find the average speed.

Mathematics
2 answers:
cluponka [151]3 years ago
7 0

Answer:

12.5 km/hr

Step-by-step explanation:

You find the mean after making them both the same measurement.

You would divide 10 by 2 to get 5 km/hr

You would use the 20 km/hr

You would add them and get 25

Then divide by 2 to find the mean and get 12. 5

PLZ MARK BRAINLIEST

Deffense [45]3 years ago
7 0
Answer: 10km/hr

Explanation:

The equation for average speed is total distance divided by total time.

See picture below for work.

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Using appropriate properties, find the value of 249² - 248²
Lady_Fox [76]

Answer:

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Step-by-step explanation:

=> \sf 249^2 - 248^2

<u>Using Formula</u> \sf a^2 - b^2 = (a+b)(a-b)

<u><em>Where </em></u>

a = 249

b = 248

=> \sf (249+248)(249-248)

=> \sf (497)(1)

=> 497

3 0
3 years ago
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iren [92.7K]

Answer:

y=3x-7

Step-by-step explanation:

lines are parallel hence gradient from the equation in question is the same as the gradient of the equation to be found.. comparing to y=mx+c, eq in question has grad 3... from the formula y-y1=m(x-x1) where (x1,y1) is equal to the point in question

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A model train is 9 centimeters long. The actual engine is 18 meters long. What is the scale of the model? Tracy has a model trai
Umnica [9.8K]

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1 cm : 2m

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118m

Step-by-step explanation:

A scale drawing is a reduced form in terms of dimensions of an original image / building / object

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Solve<br> y=2x2-3x-1<br> y=x-3
4vir4ik [10]

Answer:

The value of x is 1 and y = -2

Step-by-step explanation:

y = 2x²- 3x - 1;

y = x - 3

2x²- 3x - 1 = x - 3

2x² - 3x - 1 - x + 3 = 0

2x² - 4x + 2 = 0

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2(x² - 2x + 1) = 0

x² - 2x + 1 = 0

x² - x - x + 1 = 0

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(x - 1) (x - 1) = 0

x - 1 = 0 or x - 1 = 0

x = 1 or x = 1

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y = x - 3

y = 1 - 3

y = - 2

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<u>-TheUnknown</u><u>Scientist</u>

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3 years ago
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Vsevolod [243]

Answer: p=0.87 (density of oil), m=37.5 (mass of liquid), v=11.92 (volume of liquid)

Step-by-step explanation:

p=m/v

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4 years ago
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