Question

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Part 1
Elisabeth and Miriam exchanged 240 text messages in 80 minutes. An equal number of texts was sent each minute. The girls can send 60 more text messages before they are charged an additional fee. Complete the double number line diagram. At this​ rate, how many more minutes can the girls exchange texts before they are charged​ extra?
LOADING... Click the icon to view the incomplete double number line diagram.
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Part 1
Complete the diagram. Choose the correct answer below.
A.
font size increased by 2 0font size increased by 2 0font size increased by 8 Text Messagesfont size increased by 8 Minutesfont size increased by 2 240font size increased by 2 80font size increased by 2 300font size increased by 2 100



x y graph
Your answer is correct.B.
font size increased by 2 0font size increased by 2 0font size increased by 8 Text Messagesfont size increased by 8 Minutesfont size increased by 2 240font size increased by 2 80font size increased by 2 360font size increased by 2 120



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C.
font size increased by 2 0font size increased by 2 0font size increased by 8 Text Messagesfont size increased by 8 Minutesfont size increased by 2 240font size increased by 2 80font size increased by 2 480font size increased by 2 160



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D.
font size increased by 2 0font size increased by 2 0font size increased by 8 Text Messagesfont size increased by 8 Minutesfont size increased by 2 240font size increased by 2 80font size increased by 2 260font size increased by 2 140



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Part 2
The girls can exchange texts for
  
enter your response here more minutes before they are charged extra.
​(Type a whole​ number.)
Choose the correct answer below.The girls can exchange texts for(Type a whole number.)

Answer 1

Rate = 240 messages ÷ 80 minutes = 3 messages per minute.

60 more messages ÷ 3 messages/min = 20 minutes.

So the correct double-number-line is A (240 → 80 and 300 → 100), and they can text for 20 more minutes.