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Nutka1998 [239]
3 years ago
11

on a remote controlled racing track, car a completes a lap every 15 seconds and car B compeletes a lap every 12 seconds. if they

both start side by side at the starting time how many seconds will it take them to be side by side again?
Mathematics
1 answer:
Sidana [21]3 years ago
6 0
I may not help. But i believe it is something to do with the lowest common multiple between those 2 being 60
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This is a proportion. What is the value of X?
Verizon [17]

Answer:

x = 15 or x = - \frac{2}{5}

Step-by-step explanation:

Cross- multiplying gives

(14x + 6)(17x + 5) = 9x(27x + 11) ( expanding factors )

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rearrange into standard form : ax² + bx + c = 0

5x² - 73x - 30 = 0 ← in standard form

consider the factors of the product 5 × - 30 = - 150 which sum to the coefficient of the x-term (- 73 )

the factors are - 75 and + 2

Use these factors to split the middle term

5x² - 75x + 2x - 30 = 0 ( factor by grouping )

5x(x - 15) + 2(x - 15) = 0 ← take out the factor (x - 15)

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7 0
3 years ago
If the lowest value of a data set increases what happens to the standard deviation
lara [203]

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Step-by-step explanation:

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4 0
3 years ago
Ava wants to practice ball for 2 1/2 hours each week on Monday she practices for one hour Tuesday 1/4 of an hour and Thursday 1/
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3 0
2 years ago
What is X I need help i dont know how to do this
Anit [1.1K]

Answer:

x = 75

Step-by-step explanation:

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6 0
3 years ago
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iogann1982 [59]
The answer would be approximately 9 inches but the real number is 9.42 So B is the answer. I hope this helped ^^
4 0
3 years ago
Read 2 more answers
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