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nignag [31]
4 years ago
10

A long distance telephone company advertised the rates of 5 minutes for 85¢ and 10 minutes for $1.10.

Mathematics
1 answer:
zhuklara [117]4 years ago
8 0
Let x represent the number of minutes and y the cost. Then
y - 0.85 = (1.10 - 0.85)/(10 - 5) (x - 5)
y - 0.85 = 0.25/5 (x - 5) = 1/20 (x - 5) = 1/20 x - 1/4
y = 0.05x - 0.25 + 0.85 = 0.05x + 0.6
y = 0.05x + 0.6

The cost of 25 minutes = 0.05(25) + 0.6 = 1.25 + 0.6 = $1.85
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ludmilkaskok [199]

Given:

The bases of trapezoid measuring 4 m and 12 m.

To find:

The median of the trapezoid.

Solution:

The median of the trapezoid is the average of its bases.

\text{Median}=\dfrac{\text{Upper base + Lower base}}{2}

The bases of trapezoid measuring 4 m and 12 m. So, the median of the trapezoid is:

\text{Median}=\dfrac{4+12}{2}

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\text{Median}=8

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3 years ago
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Vikki [24]

Answer:

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We add all to get:

5 + 5 + 30 + x = 40

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8 0
3 years ago
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BabaBlast [244]
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6 0
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