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lakkis [162]
3 years ago
15

Julia pays a flat rate of $106 for her cell phone and is charged $0.12 for every text she sends. Julia spends at least $142 on h

er phone bill each month. Which of the following describes the number of texts she sends?
a. a minimum of 300
b. a maximum of300
c. more than 300
d. fewer than 300
Mathematics
1 answer:
Dominik [7]3 years ago
3 0

Answer:

a. A minimum of 300

Step-by-step explanation:

If her bill  is $142 then it is a sum of the flat rate plus the money she pays for all the smses she sent. As an equation, it can be expressed this way

106 + 0.12x = 142  where x  is the number of smses

0.12x = 36

x = 300 smses

So if we were told that she pays $142 per month, we'd know that she sends 300 smses. But we are told she pays AT LEAST $142 so there is a possibility that she sends even more than 300 smses

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Let X = number of Giraffes
Number of elephants = 3X - 4
Because it was stated that there are more than 23 elephants, the number should not fall below 23.

The algebraic expression would be:

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To get X; Transfer -4 to the other side, changing its sign to positive.

3X = 23 + 4
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To get X; Divide both sides by 3
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Since X represents the number of giraffes, then, there are 9 giraffes in the zoo.

To Check: Substitute X with 9 in the algebraic expression.

3X - 4 = 23
3(9) - 4 = 23
27 - 4 = 23
23 = 23 EQUAL


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