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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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The length of rectangle is 3 more than twice the width
kykrilka [37]

Answer:

The length of a rectangle is 3” more than twice the width. The area of the rectangle is 150 in^2. Find the dimensions of the rectangle.

The length of a rectangle is 3” more than twice the width. The area of the rectangle is 150 in^2. Find the dimensions of the rectangle.

Wyzant

MATH QUADRATIC FORMULA

Kyle C. asked • 05/05/16

The length of a rectangle is 3” more than twice the width. The area of the rectangle is 150 in^2. Find the dimensions of the rectangle.

The length of a rectangle is 3” more than twice the width. The area of the rectangle is 150 in^2. Find the dimensions of the rectangle.

ANSWER

ABOUT THIS TUTOR ›

We know that Area = Length x Width

in this case, L = 2W + 3 and A = 150in2

so, 150in2 = W x (2w + 3)

150in2 = 2W2 + 3W

rearranging, 2W2 + 3W - 150in2 = 0

we need to use the quadratic formula to solve this equation

that formula is [-b±(√b2 -4ac)]/2a

a = 2, b = 3, c = -150

inserting those values, we get [-3±(√32 -4•2•-150)]/2•2

which becomes (-3±√1209)/4

we get (-3 ± 34.771)/4

we can discard the negative value, because no length can be negative

so, W ≅ 7.942 inches

then L = 2W + 3 ≅ 18.886 inches

Proof: 7.942in x 18.886in ≅ 149.99

HOPE IT'S HELPFUL

THANK YOU

4 0
3 years ago
What is [ -14] ?<br><br> a. -14 <br> b. -7 <br> c. 7 <br> d. 14<br> e. 1/14<br>​
aleksklad [387]

Answer:

D

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
HELP I NEED HELP ASAP
Ilya [14]
Substitute -x-5 for y
Gets you:
3x-2(-x-5)
Distribute the 2
3x-(-2x-10)
Distribute the -1
3x+2x+10
Combine like terms
5x+10
Subtract 10 from both sides
5x=-10
Divide by 5
x = -2
4 0
3 years ago
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