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sergij07 [2.7K]
3 years ago
14

Determine if 4,1 is a solution for the equation for the system of equations

Mathematics
1 answer:
vlabodo [156]3 years ago
7 0

Answer:

5

Step-by-step explane:

wrw

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Help me pls I’m not that smart
erica [24]

Answer:

33

Step-by-step explanation:

Plug in 5 for x in the equation:

3 + 6(5)

3 + 30

33

7 0
3 years ago
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4x+y=10 missing value
hoa [83]

Answer:

Step-by-step explanation:

Set each axis to 0

4(0)+y=10

y=10

4x+0=10

divide the equation by 4

x=2.5

if both axis' need to be the same number, they are equal to 2

6 0
3 years ago
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The operations manager at a compact fluorescent light bulb (CFL) factory needs to estimate the mean life of a large shipment of
aliya0001 [1]

Answer:

The 95% confidence interval estimate for the population mean life of compact fluorescent light bulbs in this shipment is between 7,255 hours and 7,745 hours.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.95

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.96*\frac{1000}{\sqrt{64}} = 245

The lower end of the interval is the sample mean subtracted by M. So it is 7500 - 245 = 7255 hours.

The upper end of the interval is the sample mean added to M. So it is 7500 + 245 = 7745 hours.

The 95% confidence interval estimate for the population mean life of compact fluorescent light bulbs in this shipment is between 7,255 hours and 7,745 hours.

7 0
3 years ago
Mr. Thomas purchased a car for $30,000. in 4 years the value of the car decreased to $22,000. Which integer represents the avera
Llana [10]
The change in value over 4 years is
  $22,000 - 30,000 = -$8,000

so the average change in value per year is
  -8000/4 = -2000
4 0
3 years ago
Jason enjoys walking around the block with his dog, Ringo. When Jason and Ringo walk w times around the block, they walk 0.75w m
Diano4ka-milaya [45]

Answer: It's 9!

Step-by-step explanation: Given W=12,

0.75 times 12= 9!

3 0
3 years ago
Read 2 more answers
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