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marshall27 [118]
3 years ago
9

Im really confused can somebody explain this?

Mathematics
1 answer:
vovikov84 [41]3 years ago
5 0

<u>Given</u>:

The given ratio is 16 : 12

We need to determine three ratios that are equivalent to the given ratio.

<u>Option A</u>: 8:6

The given ratio is 16 : 12

Let us divide the given ratio 16 : 12 by 2.

Thus, we have;

8:6

Hence, the expression 8:6 is equivalent to 16 : 12

Thus, Option A is the correct answer.

<u>Option B</u>: 32:24

The number 32 goes by 16 in 2 times and the number 24 goes by 12 in 2 times.

Thus, multiplying the ratio 16 : 12 by 2, we get;

32:24

Thus, the expression 32:24 is equivalent to 16 : 12

Hence, Option B is the correct answer.

<u>Option C</u>: 4:3

Let us divide the given ratio 16 : 12 by 4.

Thus, we have;

4:3

Thus, the expression 4:3 is equivalent to 16 : 12

Hence, Option C is the correct answer.

<u>Option D</u>: 12:8

The number 12 goes by 16 in \frac{3}{4} times and the number 8 goes by 12 in \frac{2}{3} times.

The ratios are multiplied by different numbers.

Thus, the expression 12:8 is not equivalent to 16 : 12

Hence, Option D is not the correct answer.

<u>Option E</u>: 24:16

The number 24 goes by 16 in 1.5 times and the number 16 goes by 12 in 0.75 times.

The ratios are multiplied by different numbers.

Thus, the expression 24:16 is not equivalent to 16 : 12

Hence, Option E is not the correct answer.

Therefore, the equivalent ratios are Option A, B and C

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Complete  Question

The complete question is shown on the first uploaded image

Answer:

The standard deviation is  \sigma  =  1.17      

Step-by-step explanation:

From the question we are told that

   The data is  

 x          1  2  3        4

P(X = x)    0.2 0.2 0.2   0.4  

 Generally the standard deviation is mathematically represented as

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Here    x^2 =  1^2 \ \ 2^2 \ \ 3 ^2 \ \ 4^2

    =>     x^2  =  1 \ \ 4 \ \ 9\  16  \

      \sum  x^2 * P(x) =  (1 * 0.2) +  (4 * 0.2   ) + (9 * 0.2 ) + (16 *  0.2 )

     \sum  x^2 * P(x) = 9.4

      \sum x P(x) =  (1 *0.2) +  (2*0.2) + (3 *  0.2) + (4 * 0.2)

     \sum x P(x) =  2.8

So  

    \sigma  =  \sqrt{ 9.2  - (2.8)^2   }            

    \sigma  =  1.17        

6 0
3 years ago
(3x − 4)(2x)2 + 2x − 1).
zzz [600]
<span><span><span><span><span>(<span><span>3x</span>−4</span>)</span><span>(<span>2x</span>)</span></span><span>(2)</span></span>+<span>2x</span></span>−1

</span>Distribute:

<span>=<span><span><span><span><span><span>12<span>x2</span></span>+</span>−<span>16x</span></span>+<span>2x</span></span>+</span>−1

</span></span>Combine Like Terms:

<span>=<span><span><span><span>12<span>x2</span></span>+<span>−<span>16x</span></span></span>+<span>2x</span></span>+<span>−1</span></span></span><span>=<span><span><span>(<span>12<span>x2</span></span>)</span>+<span>(<span><span>−<span>16x</span></span>+<span>2x</span></span>)</span></span>+<span>(<span>−1</span>)</span></span></span><span>=<span><span><span>12<span>x2</span></span>+<span>−<span>14x</span></span></span>+<span>−1

</span></span></span>Answer:<span>=<span><span><span>12<span>x2</span></span>−<span>14x</span></span>−<span>1

hope this helps! was there meant to be a parenthesis by the 2 + 2x - 1??  </span></span></span>
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Answer:

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Step-by-step explanation:

someone else already answered this question on a different place lol

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Answer:

Step-by-step explanation:

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= Sin (-57°16'22")=-0.84147

2.

= (229°54'32")

=75.963757 Degrees

3.  

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Answer:

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