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Leto [7]
3 years ago
7

In a zoo there are 30 monkeys, some gorillas and chimpanzees. The ratio of monkeys to gorillas is 6 to 1. The ratio of monkeys t

o chimpanzees is 5 to 2. How many gorillas are there? How many chimpanzees are there?
Mathematics
1 answer:
gregori [183]3 years ago
4 0
If the ratio of monkeys to gorillas is 6:1
that means (1÷6)*30=5 gorillas

if the ratio of monkeys to chimpanzees is 5:2
that means (2÷5)*30=12 chimpanzees
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Which two quantities form a proportional relationship?<br><br> pls help asap ignore the answer i put
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Answer:

C

Step-by-step explanation:

15 times 2 is 30

1 times 2 is 2

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2 years ago
A rectangle is 5 meters longer than its width. If the length is shortened by 2 meters and width is increased by 1 meter, the are
Katarina [22]

Answer: Area = 6m²

              Smaller number = 16

              Hours = 9.6 h

Step-by-step explanation:

A rectangle is 5 meters longer than its width. If the length is shortened by 2 meters and width is increased by 1 meter, the area remains the same. Find the area of the rectangle.

1) w = x m                                2) w = x + 1 m

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A₁ = A₂

A = w*l

A₁ = x(x+5) = x² + 5x

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x² + 5x = x² + 3x + 2

5x - 3x = 2

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x = 1

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The ratio of two numbers is 2:5. If the larger number is 40, what is the smaller number.

<u> 2 </u> = <u> x </u>

5     40

5x = 80

x = 80/5 = 16

Sixteen construction workers can finish cementing a floor of a building in 3 hours. On a certain day, only 5 construction workers are available for the job. How long will it take the 5 construction workers to do the cementing job?

workers                      hours

    16                              3

     5                               x

↑                                          ↓              inversely proportional

<u> 5 </u> = <u> 3 </u>

16      x

5x = 16*3

5x = 48

x = 48/5

x = 9.6 h

 

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