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Keith_Richards [23]
3 years ago
14

Kai lives 3 kilometers from school, Brea lives 30,000 meters from school, and Cal lives 30,000 centimeters from school. Which st

atement about these distances is true?
A. Kai lives the farthest from school
B. Brea lives the closest to school
C. Cal lives farther from school than Kai
D. Brea lives the farthest from school
MARKING BRAINLIST IF CORRECT!! :)
Mathematics
1 answer:
Sedbober [7]3 years ago
6 0

Answer:

D. Brea lives the farthest from school

Step-by-step explanation:

The easiest way to go about this is to get them all to the same unit. Let's do meters :)

3 kilometers = 3,000 meters (Kai)

30,000 centimeters = 300 meters (Cal)

and then of course 30,000 meters is already in the correct unit (Brea)

Given all of this, you can easily tell that the answer is D

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Solving a system of equations, we can see that:

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<h3>How to find the speeds of each jet?</h3>

Let's define the variables:

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With the given information, we can write:

P*8h = D

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C = 2*P - 144mi/h

So we have a system of 3 equations, where D is the distance in the problem.

With the first and second equations we can write:

P*8h = D = C*7h

Isolating P, we get:

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Now we can replace that in the last equation:

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C = 2*C*(7/8) - 144mi/h

And now we can solve that for C.

C - 2*(7/8)*C = - 144mi/h

C*(1 - 14/8) = -144mi/h

C*(8/8 - 14/8) = - 144mi/h

C*(6/8) = 144mi/h

C = (8/6)*144mi/h = 192mi/h

Now that we know the speed of the commercial jet, we can find the speed of the private jet.

P = C*(7/8) = 192mi/h*(7/8) = 168 mi/h

If you want to learn more about systems of equations:

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Answer:

Step-by-step explanation:

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it's betteen 1.4 & 1.5

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In triangle ABC, cos A =
nikitadnepr [17]

The other expression that has a value of \frac{7}{25} is A) sin B.

Step-by-step explanation:

Step 1:

sin\theta = \frac{oppositeside}{hypotenuse} , cos\theta = \frac{adjacentside}{hypotenuse} , tan \theta = \frac{opposite side}{adjacent side} .

For angle B, the opposite side measures 7 units, the adjacent side measures 24 units and the hypotenuse measures 25 units.

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Step 2:

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