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3 years ago

Please help me with these 3 questions!! Will mark Brainliest :)

Mathematics

1 answer:

dem82 [27]3 years ago

6 0

Answer:

7. 75.36 inches

8. 21 inches

9. 13 inches

Step-by-step explanation:

7. Circumference = π × d

The diameter would be two times the radius, or 2 × 12 = 24. So, circumference would be 3.14 × 24 = 75.36 inches.

8. Circumference = π × d

If we move variables around, d = Circumference / π

So, d = 65.94 / 3.14 = 21 inches.

9. To do this, let's figure out the diameter: d = Circumference / π

d = 81.64 / 3.14 = 26. Now the diameter is two times the radius, so to get the length of the radius, we must divide the diameter in half. 26 / 2 = 13 inches.

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3 years ago

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A farmer was counting his chickens and pigs. He had 16 animals in all and counted 54 legs. How many chickens does he have

Vikentia [17]

Answer:

5 chickens

Step-by-step explanation:

Let's set chickens and pigs with variables "c" and "p" respectively.

We know there a 16 animals in all, so there are:

c+p=16

We know there are 54 legs and chickens have 2 legs and pigs have 4 legs each:

2c+4p=54

Now we have our system of equations:

c+p=16

2c+4p=54

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So there are 5 chickens.

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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The length of a bridge is 230 m. The length of each of Robert's paces is 75 cm.

wariber [46]

Answer:

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Step-by-step explanation:

First, lets convert Robert's pace to metres. (cm > m)

75cm = (75/100)m

= 0.75m

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$\frac{230m}{0.75m} \\ = 306 \frac{2}{3} paces$

See , we must have full paces, and in this case we are finding the minimum number of paces, so we will be looking at the lowest possible whole number, which in this case, is 307 paces.

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