3 years ago

Help me...............

Mathematics

1 answer:

True [87]3 years ago

3 0

Answer:

Brainliestgive o020201000

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Quality control is an important issue at ACME Company which manufacturers light bulbs. In order to conduct testing of the life h

mrs_skeptik [129]

Answer: 3424.28

Step-by-step explanation:

Given data : 378, 361, 350, 375, 200, 391, 375, 368, 321

Number of data values = 9

Mean : $\overline{x}=\dfrac{\sum^n_{i=1} x_i}{n}$

$\\\\=\dfrac{378+361+350+375+200+391+375+368+321}{9}\\\\=\dfrac{3119}{9}\approx346.56$

Variance = $\dfrac{\sum^n_{i=1} (x_i-\overline{x})^2}{n-1}$

$\sum^n_{i=1} (x_i-\overline{x})^2 = (31.44)^2+(14.44)^2+(3.44)^2+(28.44)^2+(-146.56)^2+(44.44)^2+(28.44)^2+(21.44)^2+(-25.56)^2\\\\=27394.2224$

Variance = $\dfrac{27394.2224}{8}=3424.2775\approx3424.28$

4 0

3 years ago

If xy- 3y²= 15 ,find the value of x when y=2

rjkz [21]

Answer:

X=13.5

Step-by-step explanation:

Y=2 so

2x-3*2^2=15

2x-12=15

2x=27

X=13.5

5 0

3 years ago

Read 2 more answers

The first three terms of a sequence are given. Round to the nearest thousandth (if necessary).

BaLLatris [955]

Answer:

a₆ ≈ 25.284

Step-by-step explanation:

There is a common ratio between consecutive terms , that is

8 ÷ 6 = $\frac{32}{3}$ ÷ 8 = $\frac{4}{3}$

This indicates the sequence is geometric with nth term

$a_{n}$ = a₁ $r^{n-1}$

where a₁ is the first term and r the common ratio

Here a₁ = 6 and r = $\frac{4}{3}$ , then

a₆ = 6 × $(\frac{4}{3}) ^{5}$ = 6 × $\frac{1024}{243}$ = $\frac{6(1024)}{243}$ ≈ 25.284 ( to the nearest thousandth )

6 0

2 years ago

Read 2 more answers

Is 26 a perfect square

Leno4ka [110]

No because you can see nothing will fit in the number but the a n s we r is no

4 0

3 years ago

The Candle Company is having its semiannual sale. All items are 40 percent off. If the original price of a candle basket is $120

irakobra [83]

Answer:

multiply 120 by 0.6 to find the result with 40% taken away

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

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