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elena-14-01-66 [18.8K]
2 years ago
15

In Year 11 at the school, the ratio of the number of pupils who study Chemistry to

Mathematics
2 answers:
8090 [49]2 years ago
8 0

Answer:

17.5

105÷3 is 35

37÷2 is 17.5

Doss [256]2 years ago
4 0

Answer:

70

Step-by-step explanation:

Chem : Phy = 3: 2

Since we have 105 pupils studying Chem and let's say we have x students stuyding Phy.

We have :3:2=105:x

3x=210

x=70

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Answer:

Option D.

Step-by-step explanation:

  • First, the you need ti understand that the triangle is an isosceles right angled triangle. In other words, the base and height are equal in length. The third side is the slide. This is the longest side.
  • Next, we know that the formula for calculating the area of a right angled triangle is given by:

        A = 1/2 (base × perpendicular height)

  • The perpendicular height is equal to the base. Let's say the base is <em>x</em>. It means that the height is also x, since height = base.
  • Therefore, the formula will be:

       A = 1/2 (x.x)

           =1/2 (x²)

      32 = 1/2 (x²)

     Multiplying both sides by 2 gives:

     32×2 = x²

     64  = x²

       8   = x

To find the third side, we use the Pythagoras theorem:

    C² = A² + B²

         = 8² + 8²

         = 128

   C = √128

       = 8√2

However, the answer will not be exact, so we  multiply the length of the base and height by 2. This gives x = 16 (Length of base = length of height)

Repeating the steps above gives C = √ (16)² + (16)²

                                                           = √256

This corresponds to option D.

3 0
3 years ago
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Inessa05 [86]

Answer:

B. -3

Step-by-step explanation:

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I am joyous to assist you anytime.

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The answer is twenty four
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