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stealth61 [152]
3 years ago
9

Teresa, Eric, and Ryan sent a total of 99 text messages over their cell phones during the weekend. Eric sent 3 times as

Mathematics
1 answer:
faust18 [17]3 years ago
8 0

I'll use t for the messages Teresa sent, e for messages Eric sent, and r for messages Ryan sent.

Therefore we have, t+e+r=99.

From the text we also know:

e=3r ; r=t+6

If we substitute in the original equation we get:

t+3(t+6)+t+6=99; By simplifying it we get

5t=75 , therefore t=75/5=15.

Since Teresa send 15 messages,Ryan sent 6 more then here, so he send 21. Eric sent three times the

messages Ryan sent so he sent 63 messages. If we add them together 15+21+63, we get the total of 99 messages.

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Now we can substitute 13 into each expression to find the value of each angle...

2x + 1 =
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So the 3 angles are 27 degrees, 36 degrees, and 117 degrees.

The smallest is 27 degrees

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tamaranim1 [39]

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2 years ago
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Answer:

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Step-by-step explanation:

Using the z score formula to solve this question

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Using the z score table as well as probability calculator(as requested in the question to find the z score)

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vova2212 [387]

Answer:


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Answer:

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