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pochemuha
2 years ago
9

Another teacher decides to average the height of all 15-year-old male students in his classes throughout the day. By the end of

the day, he measured the height of 57 boys and calculated an average of 68.1 inches. The known mean height for 15-year-old boys is 67 inches, with a standard deviation of 3.19 inches. What is the percentile rank for this sample? (enter a number only, rounded to the nearest 2 decimal places)
Mathematics
1 answer:
Tanya [424]2 years ago
4 0

Answer: 0.47

Step-by-step explanation:

0.47% = 0.0047 in decimal form. Percent means 'per 57'. So, 67Inches means 0.47 per 100 or simply 0.47/100. If you divide 0.47 by 100, you'll get 0.0047 (a decimal number).

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Answer:

12 centimeters

Step-by-step explanation:

An isosceles triangle has two congruent sides which are legs(2 sides having same length )If x is length of each leg, then we ca write the equation like this

equation: x+x+8=32

combine like terms

2x +8 = 32

minus 8 from each side

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divide both sides by 2

2x/2 = 24/2

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3 years ago
Solve the following equation for y.<br>x-5y=-18<br>​
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Answer:

y=15x+185

Step-by-step explanation:

Step 1: Add -x to both sides.

x−5y+−x=−18+−x

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Step 2: Divide both sides by -5.

−5y−5=−x−18−5

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2 years ago
Which values of xwould make a polynomial equal to zero if the factors of the
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C.-2 and -11 that would be the answer.
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2 years ago
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3 years ago
For what values of $x$ is $$\frac{x^2 + x + 3}{2x^2 + x - 6} \ge 0?$$ note: be thorough and explain why all points in your answe
Rus_ich [418]

To solve the inequality \frac{x^2+x+3}{2x^2+x-6}\ge \:0

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The numerator x^2+x+3 is not factorizable.

so factor the denominator 2x^2+x-6:

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Now take \mathrm{Factor\:out\:common\:term\:}\left(2x-3\right)

Then we get factor of the denominator as \left(2x-3\right)\left(x+2\right)

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5 0
3 years ago
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