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3 years ago

5

Two buses leave Phoenix at the same time traveling in opposite directions. One bus travels at 62mph and the other at 58mph. How

soon will they be 300 miles apart?

1 answer:

lawyer [7]3 years ago

3 0

Answer:

2 hour and 30 minutes

Step-by-step explanation: 120 miles = 1 hour

240 = 2 hour

300 = 2hour 30 min

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Juli2301 [7.4K]

Answer:

(m - 10)(m - 2)

Step-by-step explanation:

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(m - 10)( m - 2).

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3 years ago

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Reil [10]

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I believe the answer is 3/7. Hope this helps!

Step-by-step explanation:

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3 years ago

Prove that if r is any rational number, then 3r2 − 2r + 4 is rational. The following properties may be used in your proof. Prope

ziro4ka [17]

Given:

Expression is

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To prove:

If r is any rational number, then $3r^2-2r+4$ is rational.

Step-by-step explanation:

Property 1: Every integer is a rational number. It is Theorem 4.3.1.

Property 2: The sum of any two rational numbers is rational. It is Theorem 4.3.2.

Property 3: The product of any two rational numbers is rational. It is Exercise 15 in Section 4.3.

Let r be any rational number.

We have,

$3r^2-2r+4$

It can be written as

$3(r\times r)-2r+4$

Now,

3, -2 and 4 are rational numbers by property 1.

$r^2=r\times r$ is rational by Property 3.

$3r^2\text{ and }-2r$ are rational by Property 3.

$3r^2+(-2r)+4$ is rational by property 2.

So, $3r^2-2r+4$ is rational.

Hence proved.

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3 years ago

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Answer:

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Answer:

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