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Crazy boy [7]
3 years ago
9

Two cities are 45 miles apart. Two trains, with speeds of 70 mph and 60 mph, leave the two cities at the same time so that one i

s catching up to the other. How long after the trains leave will they be 10 miles apart for the first time? How long after the trains leave will they be 10 miles apart for the second time?​
Mathematics
1 answer:
Sergio039 [100]3 years ago
7 0
8.57 for the first one and, I’m not sure a bout the second time though
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Answer:

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3 years ago
Solve by elimination:
Pie

Answer:

B (5, 13)

Step-by-step explanation:

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9x + 6y = 123

To solve by elimination, we want to <em>eliminate</em> a variable. To do this, we must make one variable cancel out.

First, we can see that both equations have 9x. To cancel out x, we must make <em>one</em> of the 9x's <em>negative</em>. To do this, multiply <em>each term</em> in the equation by -1.

-1(9x + 6y = 123)

-9x - 6y = -123

This is one of your equations. Set it up with your other given equation.

9x + 4y = 97

-9x - 6y = -123

Imagine this is one equation. Since every term is negative, you will be subtracting each term.

9x + 4y = 97

-9x - 6y = -123

___________

0x -2y = -26

-2y = -26

To isolate y further, divide both sides by -2.

y = 13

Now, to find x, plug y back into one of the original equations.

9x + 4(13) = 97

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Check your answer by plugging both variables into the equation you have not used yet.

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Your answer is correct!

(5, 13)

Hope this helps!

6 0
3 years ago
Masco Industries has 285,000 total employees. Of those employees, 85,500 telecommute. What percent of the company’s total employ
frosja888 [35]

Answer:

30%  of the company’s total employees telecommute

Step-by-step explanation:

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To find the percentage of company’s total employees telecommute

We divide the number of employees telecommute by total employees

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Percentage = \frac{85500}{285000} * 100

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4 0
3 years ago
the measure of the angles of a triangle are in the extended ratio 3 : 5 : 7 what is the measure of the smallest angle?
julia-pushkina [17]
3:5:7:15
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6 0
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Answer:

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