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o-na [289]
2 years ago
10

Thirty-six members of the middle school choir, or 30% participated in the regional contest, as shown in the model below.

Mathematics
1 answer:
Firlakuza [10]2 years ago
3 0

Answer:

There are 120 students in the choir.

Step-by-step explanation:

Given that:

Number of members who participated in contest = 36

This represents 30% of the total members of choir at the school.

Let,

x be the number of total sutdents

30% of x = 36

\frac{30}{100}x=36

0.3x = 36

Dividing both sides by 0.3

\frac{0.3x}{0.3}=\frac{36}{0.3}\\x=120

Hence,

There are 120 students in the choir.

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The quantities X and Y are proportional find the constant of proportionality (r) in the equation y=Rx
Juliette [100K]

Answer:

y/x = R

Step-by-step explanation:

The two quantities x and y are proportional means they have a relation.

The equation is;

y= Rx ------to find the proportional R you make R the subject of the formula;

y/ x = R

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3 years ago
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Hotels, like airline, often overbook, counting on the fact that some people with reservations will cancel at the last minute. A
agasfer [191]

Answer: The required probability is 0.334.

Step-by-step explanation:

Since we have given that

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probability of reservations will be used = 1-0.2=0.8

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The mean length of 4 childrens' big finger is 14cm. The mean length of 9 adults' big finger is 16.1cm. What is the mean length (
Mamont248 [21]

Answer:

The mean length of the 13 people's big finger is 15.45 cm

Step-by-step explanation:

Given;

mean length of 4 childrens' big finger, x' = 14cm

mean length of 9 adults' big finger is 16.1cm, x'' = 16.1cm

Let the total length of the 4 childrens' big finger = t

x' = \frac{t}{n} \\\\x' = \frac{t}{4}\\\\t = 4x'\\\\t = 4 *14\\\\t = 56 \ cm

Let the total length of the 9 adults' big finger = T

x'' = \frac{T}{N} \\\\x'' = \frac{T}{9}\\\\T = 9x''\\\\T = 9*16.1\\\\T = 144.9 \ cm

The total length of the 13 people's big finger = t + T

                                                                           = 56 + 144.9

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The mean length of these 13 people's big finger;

x''' = (200.9) / 13

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Therefore, the mean length of the 13 people's big finger is 15.45 cm

3 0
3 years ago
Tickets prices for a science museum are $18 for adults and $12 for students. If $162 is collected from a group of 12 people, how
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x+y=12
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Use the graph to find the cost of 8 shirts,
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