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Lubov Fominskaja [6]
3 years ago
7

Mrs. avery is going to randomly select one student from her class to read a poem out loud. there are 151515 boys and 131313 girl

s in her class. what is \text{p(boy})p(boy)p, left parenthesis, b, o, y, right parenthesis
Mathematics
2 answers:
arlik [135]3 years ago
8 0
P(boy) is asking for the probability that a boy will be chosen to read a poem out loud. Since there are 15 boys, we can get the probability by dividing this with the total number of students. This is because out of all the students, there is an equal possibility that each of the 15 boys will be chosen.

\frac{15}{15+13}= \frac{15}{28}=0.5357

ANSWER: The probability that a boy is selected is 0.5357 or 53.57%
Sladkaya [172]3 years ago
5 0

Answer:

The answer is 15/28.

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Tema [17]

Answer:

42 = <em>l</em>

21 = <em>w</em>

Step-by-step explanation:

{l = 2<em>w</em>

{126 = 2<em>w</em> + 2<em>l</em>

126 = 2<em>w</em> + 2[2<em>w</em>]

126 = 2<em>w</em> + 4<em>w</em>

126 = 6<em>w</em>

21 = w [Plug this back into both equations to get the length of 42]; 42 = <em>l</em>

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4 0
3 years ago
t takes Phillip 7 hours to proof a chapter of Hawkes Learning Systems' Intermediate Algebra book and it takes Kim 3 hours. How l
Leya [2.2K]

Answer:

2.1 hrs

Step-by-step explanation:

In 1 hr, Phillip would have proofed 1/7 of the chapter. In 1 hr, Kim would have proofed 1/3 of the chapter. So, together in 1 hr, they would have proofed 10/21 of the chapter. So, it would take 21/10 or 2.1 hrs to proof the whole chapter together.

5 0
3 years ago
I need help with this. 2x+4=4x
xxTIMURxx [149]
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4 0
2 years ago
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5 0
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Answer:

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Step-by-step explanation:

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