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2 years ago

Please help me i cannot understand these Questions

Mathematics

1 answer:

emmainna [20.7K]2 years ago

6 0

Answer:

In the last task, the result is 17+3x/6

Step-by-step explanation:

X+5/3 - 2x-7/6 + x/2

2(x+5)-(2x-7)+3x /6

2x+10-2x+7+3x /6

17+3x/6

I dunno this task above, I hope this one is correct :))

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

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2 years ago

If 7 giant solar power plants generate 1.3 gigawatts (GW) of energy to power 900,000 homes, how many gigawatts can 21 giant sola

Mice21 [21]

Answer:

2,700,000 homes

Step-by-step explanation:

6 0

2 years ago

ILL GIVE BRAINLESTTTTTT

denpristay [2]

Answer:

Step-by-step explanation:

5/3 *2=10/6

10/6-6/6=4/6

7 0

2 years ago

Help me please I need the help

stepladder [879]

The answer is 9 guests total

6 0

2 years ago

Please help me solve this I am begging you

koban [17]

Answer:

is between 2 and 3

2 and 3

12 and 14

Step-by-step explanation:

The exact point is 2.645 just telling you if the dropbox does not have this options you can go off this.

4 0

2 years ago

Read 2 more answers