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Llana [10]
3 years ago
11

A car moves a distance of 100m in 12 seconds. what is the average speed in km/h​

Mathematics
1 answer:
Maksim231197 [3]3 years ago
5 0

Answer:

30km/h.

Step-by-step explanation:

100m/12s = 0.1km/12s

There are 3600 seconds in an hour.

0.1km/12s = 30km/h.

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Help me please<br> How many solutions does the equation<br> x -4 = 12 - 2x have? Explain.<br> - ? .
MA_775_DIABLO [31]

Answer: <em>one solution.</em>

Step-by-step explanation:

\dfrac{2}{3} x-4=12-2x\\\\\dfrac{2}{3} x+2x=12+4\\\\2\dfrac{2}{3} x=16\\\\\dfrac{8}{3} x=16\\\\8x=16 \cdot 3\\\\8x=48\\\\x=\dfrac{48}{8} =6

<em>This equation has one solution:  x = 6.</em>

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The output of a flashlight is 2.0 x 10 lumens. If 1 lumen is about 1.464 x 10 3 watts, then
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3 years ago
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Elanso [62]

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2 years ago
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What is the cost of constructing a fence 6 feet, 6 inches, high around a lot measuring 90 feet by 175 feet, if the cost of erect
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Answer:

The total cost is $3504.625

Step-by-step explanation:

1 inch = 0.0833333 feet

Height = 6 feet 6 inches =6+6 \times 0.0833333=6.5 feet

Length = 90 feet

Breadth = 175 feet

Perimeter = 2(l+b)=2(90+175) = 530 feet

Cost of erecting the fence is $1.25 per linear foot .

So, Cost of erecting the fence of 530 feet = 530 \times 1.25

Cost of erecting the fence of 530 feet = 662.5

Area of fence = 2(l+b)h=530 \times 6.5=3445 feet^2

Cost of materials is $0.825 per square foot of fence

Cost of materials of 3445 square foot of fence = 3445 \times 0.825

                                                                             = 2842.125  

Total cost = $2842.125+$662.5

Total cost = $3504.625

Hence the total cost is $3504.625

6 0
3 years ago
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