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Andre45 [30]
2 years ago
6

Lucy, Sam, and Jim sent a total of 75 text messages over their cell phones during the weekend. Lucy sent 5 more messages than Sa

m. Jim sent 2
times as many messages as Lucy. How many messages did they each send?
Mathematics
2 answers:
prohojiy [21]2 years ago
4 0
Jim = 40 messages
Sam = 15 messages
Lucy = 20 messages
Oksi-84 [34.3K]2 years ago
4 0
<h3>answer</h3>

82 message

Step-by-step explanation:

Lucy send 5 messages Jim send 2 messages.

5 plus 2 equals 7.

75+7=82

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The sound wave with a <u>frequency of 20</u> waves/sec is 800 longer than the wavelength of a sound wave with a <u>frequency of 16,000</u> waves/sec

<h3>Calculating wavelength </h3>

From the question, we are to determine how many times longer is the first sound wave compared to the second sound water

Using the formula,

v = fλ

∴ λ = v/f

Where v is the velocity

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For the first wave

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For the second wave

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Hence, the sound wave with a <u>frequency of 20</u> waves/sec is 800 longer than the wavelength of a sound wave with a <u>frequency of 16,000</u> waves/sec

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