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valkas [14]
3 years ago
12

Translate the following statement into an appropriate algebraic statement: The number of text messages sent times $0.15 plus the

number of minutes talked times $0.07 less a $2.50 discount will give the total cost for the cell phone bill this month.
A) $0.15t + $0.07m - $2.50 = C

B) t + m = $2.50

C) $0.15m + $0.07t = $2.50

D)$0.15m + $0.07t - $2.50 = C
Mathematics
1 answer:
Oxana [17]3 years ago
7 0
Actually the answers A since t is for text messages and it costs .15 and m is minutes and costs .07 so we add those two together to he .15t+ .07m then there's a discount of 2.50 so we subtract. So our final equation is .15t + .07m - 2.50 = C
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Answer:

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Step-by-step explanation:

Given

f(c) = M

f(x) = x^2 - x + 1

Interval: [1,8]

M = 21

Required

Find c using Intermediate Value theorem

First, check if the value of M is within the given range:

f(x) = x^2 - x + 1

f(1) = 1^2 - 1 + 1

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f(x) = 8^2 - 8 + 1

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Solving further:

We have:

f(c) = f(x) = M

f(x) = 21

Substitute 21 for f(x) in f(x) = x^2 - x + 1

21 = x^2 - x + 1

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The value of x = -4 is outside the Interval: [1,8]

So:

x = 5

f(c) = f(x) = M

f(c) = f(5) = 21

By comparison:

c = 5

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