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AleksandrR [38]
4 years ago
9

Three times the sum of half a number and 7 is 36

Mathematics
1 answer:
LUCKY_DIMON [66]4 years ago
5 0

Answer:

your answer is 19.34

Step-by-step explanation:

let the number be x

half a number = ½ x

three times means multiplied by three

so,

3( ½ x) + 7 = 36

3( ½ x) = 36 - 7

3( ½ x) = 29

½ x = 29/3

½ x = 9.67...

x = 9.67 × 2           (when we moved  ½ on the other side of the equal sign it                                      ›                               turns into 2/1 )

x = 19.34

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Answer:

\frac{20}{33}

Step-by-step explanation:

We are given that

Sophomores=13

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Seniors=8

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Let A=Seniors

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P(A)=\frac{8}{33}

P(B)=\frac{12}{33}

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P(A\cup B)=\frac{8}{33}+\frac{12}{33}

P(A\cup B)=\frac{8+12}{33}=\frac{20}{33}

Hence, the probability of selecting a junior or senior=\frac{20}{33}

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