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cupoosta [38]
3 years ago
11

HELP PLEASE!! The cost of calling Raymond's friend in Singapore is $3.00 plus $0.40 per minute. The cost as a function of time i

s shown in the graph. Write an equation that represents the cost as a function of the number of minutes. Identify the slope and y-intercept and describe their meanings. Find the cost of a 20-minute call.
Mathematics
1 answer:
german3 years ago
7 0

The equation would be y= .40x + 3 , The slope would be 2/5 and the y intercept would be 3 , the cost of a 20 minute call would be 11 dollars

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Dennis_Churaev [7]
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Margaret [11]

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3.4

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8 0
3 years ago
Identify an equation in point-slope form for the line perpendicular to y =3/4x -4 that passes through (-1, 7).
PilotLPTM [1.2K]

Answer:

y - 7 = -4/3(x + 1)

Step-by-step explanation:

<u>Given</u>

  • y =3/4x -4
  • (-1, 7)

<u>Convert to point slope form</u>

y - y1 = m(x - x1)

m: represents what the slope is

y - 7 = -4/3(x + 1)

<u>Distribute -4/3</u>

-4/3 * x = -4/3x

-4/3 * 1 = -4/3

y - 7 = -4/3x - 4/3

<u>Add seven in both sides</u>

21/3 -4/3 = 17/3

y = -4/3x + 17/2

<u>Answer</u>

linear equation: y = -4/3x + 17/2

point-slope form: y - 7 = -4/3(x + 1)

3 0
3 years ago
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