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shutvik [7]
3 years ago
10

Help! Please I got till tomorrow

Mathematics
1 answer:
serious [3.7K]3 years ago
4 0

Answer:

6) Total number of students who took the test = 240

7) (2) 90% of the students who took the test ha scored equal or less Sal's score.

Step-by-step explanation:

<h3>6)</h3>

Formula to calculate 5th percentile

percentile = (# students who scored ≤ 60 / total number of students) * 100

5th  = 12/n * 100

5/100 = 12/n

0.05 = 12/n

n = 240

Total number of students who took the test = 240

<h3>7)</h3>

90th percentile means Sal scored better than 90% of people who took the test.

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Viktor [21]

Answer:1 2/3

Step-by-step explanation:

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find the value of x show your work in the diagram below C is the midpoint of segment a b, a c equals 5x + 2 + CB equals 3x + 12
Dmitrij [34]

Answer:

Initial equation: 5x + 2 = 3x + 12

x = 5

Step-by-step explanation:

Point C is the midpoint between A and B.

This means that:

AC = CB

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AC = 5x + 2

CB = 3x + 12

Since AC = CB, the initial equation is:

5x + 2 = 3x + 12

Now we can solve

5x + 2 = 3x + 12

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8 0
1 year ago
Two boats sail away from a buoy making a 90 degree angle. The first boat is 165 meters away and is traveling at 25 m/s. The seco
NikAS [45]

Answer:


Step-by-step explanation:

lets say in the shown triangle x=165

so speed \frac{dx}{dt} =25

and  \frac{dy}{dt} =35


Also since distance = speed* time

time = pi minutes = pi/60 seconds

y = \frac{35\pi \pi }{60}

y = \frac{7\pi }{12}


Now using the pythagorean :

x^2+y^2=z^2\\so \\165^2+(\frac{7\pi }{12} )^2 =z^2

<u>derivate the equation so  we get :</u>

x\frac{dx}{dt} +y\frac{dy}{dt} =z\frac{dz}{dt} \\165*25+35*\frac{7\pi }{12}=\sqrt{165^2+(\frac{7\pi }{12})^2} *\frac{dz}{dt}


\frac{dz}{dt} =25.387 m/s

So Rate of change = <u><em>25.387 m/s</em></u>


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3 years ago
14+x=y<br><br>what does x equal ​
AfilCa [17]

Answer:

Step-by-step explanation:

14 + x = y

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