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Anna35 [415]
3 years ago
9

Would this be a combination or permutation? (probability) (i need to show work too)

Mathematics
2 answers:
Scilla [17]3 years ago
8 0

Answer:

1.) Combination

2.) 126

Hope this helps!

Step-by-step explanation:

A permutation when the order of selection is a factor.

A combination when order is not a factor.

TiliK225 [7]3 years ago
5 0
1) combination
2) 126
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If a 24-kg mass stretches a spring 15 cm, what mass will stretch the spring 10 cm
natulia [17]

Answer:

<h2>16kg</h2>

Step-by-step explanation:

 This problem is borers on elasticity of materials.

according to Hooke's law,<em> "provided the elastic limit of an elastic material is not exceeded the the extension e is directly proportional to the applied force."</em>

F= ke

where F is the applied force in N

          k is the spring constant N/m

          e is the extension in meters

Given data

mass m= 24kg

extensnion=15cm in meters= \frac{15}{100}= 0.15m

we can solve for the spring constant k

we also know that the force F = mg

assuming g=9.81m/s^{2}

therefore

24*9.81=k*0.15\\235.44=k*0.15\\k=\frac{235.44}{0.15} \\k=1569.6N/m\\

We can use this value of k to solve for the mass that will cause an extension of  10cm= 0.1m

x*9.81=1569.6*0.1\\\\x= \frac{156.96}{9.81} \\\x= 16kg

5 0
3 years ago
A store pays$344 for a chandelier and marks the price up by
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5 0
3 years ago
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lana [24]

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Step-by-step explanation:

3 0
3 years ago
7 1/4 + 5 3/5= reduced to it's lowest form
Scrat [10]
7 1/4 + 5 3/5
First, you need a common denominator to add the two. 20 will work.
4x5=20, so we have to also multiply 1 by 5.
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And now we put the fractions back in.
7 5/20 + 5 12/20
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7 5/20 + 5 12/20 = 12 17/20
Now, we're supposed to reduce it to its lowest form.
Unfortunately, the fraction cannot be reduced, because 17 is a prime number, meaning there are no factors to it except one and itself.
Therefore, the lowest form of 12 17/20 is 12 17/20
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4 0
3 years ago
PLEASE HELP!!! (8th Grade Math)
xz_007 [3.2K]

Answer:  There are 50 students in the drama club and 34 students in the yearbook club

Step-by-step explanation:

34 + 16 = 50 There are 16 more drama club students than yearbook club students. 50 + 34 =84

3 0
3 years ago
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