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Rom4ik [11]
3 years ago
14

The ratio of boys to girls in a class is 2:3 if there are 18 girls in the class how many boys are there

Mathematics
1 answer:
nikklg [1K]3 years ago
4 0

Answer:

  12 boys

Step-by-step explanation:

Multiply the ratio numbers by 6 and you have

  boys : girls = 2 : 3 = 12 : 18

There are 12 boys in the class.

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Answer: x=(7√6)/2

Step-by-step explanation:

To find x, we would have to find the hypotenuse of the 45-45-90 triangle. First, we would have to find the hypotenuse by using the 30-60-90 triangle on top to find it.

For a 30-60-90 triangle, the hypotenuse is 2x in length. the x is the same in all sides. All you would have to do is to plug it in. The leg opposite of 60° is x√3 in length. the leg opposite of 30° is x in length.

Since we know that 7 is opposite of the 30° angle, we know that x is 7. Across fron 60° is the hypotenuse of the 45-45-90 triangle. That leg is x√3. We plug in x=7 and get 7√3.

The hypotenuse of the 45-45-90 triangle is x√2 and the legs are both x. We can set 7√3 equal to x√2 to find x of the missing side.

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x=(7√6)/2

Now, we know x=(7√6)/2.

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