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OlgaM077 [116]
3 years ago
5

For his long distance phone service, Keith pays a $3 monthly fee plus 11 cents per minute. Last month, Keith's long distance bil

l was $16.42. For how many minutes was Keith billed?​
Mathematics
1 answer:
LenaWriter [7]3 years ago
3 0

Answer:

122 Minutes

Step-by-step explanation:

Start with $16.42

subtract $3 for the monthly fee, 16.42-3= $13.42

he pays $0.11 per minute so that's 13.42 x (1min/0.11) = 122minutes

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jarptica [38.1K]

Answer:

3 gallons

Step-by-step explanation:

Let

x ----> the amount of pure acid (100% solution) in gallons

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100\%=100/100=1

20\%=20/100=0.20

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we know that

(1)(x)+(0.20)(3)=(0.60)(x+3)

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7 0
3 years ago
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