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omeli [17]
3 years ago
13

Anyone plz help I need it

Mathematics
1 answer:
son4ous [18]3 years ago
4 0

Answer:

27.5 inches

Step-by-step explanation:

(68.1+11.2+x)/3=35.6

68.1+11.2+x=106.8

79.3+x=106.8

x=27.5

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7t2 – 14t 4t2 – 9 how do u solve this
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Answer:

is there any sign between -14 and 4t2?

Step-by-step explanation:

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3 years ago
Each of 165 newly manufactured items is examined and the number of scratches per item is recorded (the items are supposed to be
denpristay [2]

Answer:

Step-by-step explanation:

Given that each of 165 newly manufactured items is examined and the number of scratches per item is recorded (the items are supposed to be free of scratches), yielding the following data

x freq x*f x^2*f

   

0 25 0 0

1 34 34 34

2 37 74 148

3 29 87 261

4 19 76 304

5 8 40 200

6 8 48 288

7 5 35 245

   

165 394 1480

Mean 2.387878788 8.96969697

Variance 3.267731864  

We get E(x) = 2.388 and hence unbiased estimator of mu is 2.388

b) Variance = 3.268

6 0
4 years ago
Find the slope and y intercept
alexgriva [62]
Slope: 5/1 (5 if simplified)
y-intercept: 10
7 0
3 years ago
Which expression is equivalent to n + n - 0.18n?
horrorfan [7]

n + n - 0.18n

We can rewrite it as

2n - 0.18n

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5 0
3 years ago
Read 2 more answers
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
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