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Slav-nsk [51]
3 years ago
14

Q4 Ali has three pieces of ropes with lengths 140 cm, 168 cm and 210 cm. He wishes to cut all of the pieces of ropes into smalle

r pieces of equal length such there is no leftover rope. i. Find the Greatest Possible Length of each smaller pieces of ropes. ii. How many smaller pieces of rope can he get altogether?
Mathematics
1 answer:
Inga [223]3 years ago
4 0

140cm of cousrse i know everything

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the credit remaining on a phone card in dollars is a linear function of the total calling time made with the card in minutes. Th
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Answer:

he credit remaining on a phone card (in dollars) is a linear function of the

total calling time made with the card (in minutes), as shown in the figure below.

The remaining credit after 45 minutes of calls is $22.80 , and the remaining

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Not sure what figure you are referring to, write an equation from the given values:

Assign the values as follows

x1 = 45; y1 = 22.80

x2 = 64; y2 = 19.76

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Find the slope (m) using the formula: m = %28y2-y1%29%2F%28x2-x1%29

m = %2819.76-22.80%29%2F%2864-45%29 = %28-3.04%29%2F%2819%29

m = -.16

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Write the equation using the point/slope formula: y - y1 = m(x - x1)

y - 22.80 = -.16(x - 45)

y - 22.80 = -.16x + 7.2

y = -.16x + 7.2 + 22.80

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Use this equation to find the credit (y) when minutes (x) = 73

y = -.16(73) + 30

y = -11.68 + 30

y = $18.32; credit after 73 minute of calls

:

:

That you can also see the original value of the phone card: x=0, y = $30

;

:

Did this help you understand what's going on here? Any questions

Step-by-step explanation:

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Answer:

Step-by-step explanation:

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