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nordsb [41]
2 years ago
15

Out of 30 students in Mohammed's class, 40% are girls. How many are boys?

Mathematics
1 answer:
romanna [79]2 years ago
3 0

Answer:

18 boys

Step-by-step explanation:

30*0.4= 12

30-12=18

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2 years ago
The function y = x 2 - 10x + 31 has a ____
katrin [286]

Answer:

Option B. minimum is correct for the first blank

Option C. 6 is correct for second blank.

Step-by-step explanation:

In order to find the maxima or minima of a function, we have to take the first derivative and then put it equal to zero to find the critical values.

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f(x) = x^2-10x+31

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f'(x) = 2x-10

Now the first derivative has to be put equal to zero to find the critical value

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Taking 2nd derivative

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As the value of 2nd derivative is positive for the critical value 5, this means that the function has a minimum value at x = 5

The value can be found out by putting x=5 in the function

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Hence,

<u>The function y = x 2 - 10x + 31 has a minimum  value of 6</u>

Hence,

Option B. minimum is correct for the first blank

Option C. 6 is correct for second blank.

8 0
3 years ago
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2 years ago
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step 4. x = 11. (divide both sides by 15)

7 0
3 years ago
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