3 years ago

I really need help?!

Mathematics

1 answer:

ArbitrLikvidat [17]3 years ago

7 0

Answer:

the answer is a

Step-by-step explanation:

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A first number plus twice a second number is 11. Twice the first number plus the second totals 31 find the numbers

Serhud [2]

X + 2y = 11
2x + y = 31

x = 11 - 2y

2(11 - 2y) + y = 31
22 - 4y + y = 31
3y = - 9
y = - 3

x = 11 - 2(-3)
x = 11 + 6
x = 17

5 0

4 years ago

There are 17 appetizers available at a restaurant. From these, Barbara is to choose 12 for her party. How many groups of 12 appe

zaharov [31]

This is a question of combination. In other words, the question requires determination of number of ways in which 12 appetizers can be chosen form a total of 17 appetizers.

Therefore,
Possible number of 12 groups = 17C12 = 17!/[12!*(17-12)!] = 6188

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3 years ago

Find P (Sophomore | Boy)

Mandarinka [93]

Answer:

$\textbf{P} \textbf{(Sophomore}\hspace{1mm} | \hspace{1mm} \textbf{Boy)} \hspace{1mm}\textbf{=} \hspace{1mm} \frac{\textbf{5}}{\textbf{12}} $$

Step-by-step explanation:

We are asked to find the probability of picking a Sophomore who is a boy.

There are 5 Sophomores who are boys out of total boys.

$\textbf{P(A} | \textbf{B)} \hspace{1mm} \textbf{=} \hspace{1mm} \frac{\textbf{P(A and B)}}{\textbf{P(B)}}$

$\implies P(Sophomore | Boy) = \frac{P(Sophomore \& Boy)}{P(Boys)}$

$= \frac{5}{12}$

Hence, the answer.

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4 years ago

39545 rounded to the nearest thousand

KATRIN_1 [288]

It would be 40,000 if you rounded up

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3 years ago

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The chorus has 35 members. Which expression represents the number of ways a group of 6 members can be chosen to do a special per

aivan3 [116]

C) because it is the only valid response

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3 years ago