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Nonamiya [84]
3 years ago
9

Answer to (4f+1)–(4f+1)

Mathematics
2 answers:
iren2701 [21]3 years ago
5 0

Answer:

0

Step-by-step explanation:

subtracting like terms

kipiarov [429]3 years ago
4 0
4f+1-4f-1=0
Here the answer is 0
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The average annual cost of the first year of owning and caring for a large dog is $1,843 (US News and World Report, September 9,
ICE Princess25 [194]

Answer:

a. Error is 0.14

b. between 1913.68 to 1772.32

Step-by-step explanation:

Requirement a)

The margin of error is a statistic expressing the amount of random sampling error in a survey's results.

Given,

Size of the sample n = 50

We know, At 95% confidence interval,

The margin of error,

= 0.98/√n  

= 0.98/√50

= 0.98/7.07

= 0.13859 ~ 0.14

So the margin of error at 95% confidence level is 0.14.

Requirement b)

Given,

Standard deviation σ = 255

Population mean z = 1814

Size of the sample n = 50

We know, At 95% confidence interval,

(z-µ)/(σ/√n)  < Z_0.05

= - Z_0.05 < (z-µ)/(σ/√n) < Z_0.05

= - 1.96 * σ/√n < (z-µ)/(σ/√n)*  σ/√n  < 1.96 * σ/√n  [ in two tail Z test the value of Z_0.05 is 1.96 ]

= - 1.96 * 255/√50 < Z-µ <  1.96 * 255/√50

= -70.6828 < Z-µ < 70.6828

= 70.6828 > µ - Z > -70.6828

= 70.6828 + Z > µ > -70.6828 + Z

= 70.6828 + 1814 > µ > -70.6828 + 1814

=1913.68 > µ > 1772.32

So, the sample mean would be between 1913.68 to 1772.32.

7 0
3 years ago
Please help i have 2 questions thank you
katrin [286]
1. second option
2. first option
8 0
3 years ago
Tom is in dire need of a new washing machine. He knows what model he would like to get, but doesn't have the cash to pay for it.
PSYCHO15rus [73]

Answer:

b. Steve's Scratch and Dent.

Step-by-step explanation:

Tom should purchase his washing machine from Steve's Scratch and Dent.

6 0
3 years ago
Helppp pweaz and explain
Rom4ik [11]

Answer:

Surface area is 66 units.

Step-by-step explanation:

I calculated the area of each rectangle in the net.

3 x 7= 21

3 x 7= 21

2 x 3= 6

2 x 3= 6

2 x 7= 14

21 + 21 + 6 + 6 + 14 = 66

6 0
3 years ago
3. Two numbers are in the ratio 3:5. If their difference is 12, what are the numbers?​
vladimir2022 [97]
I got 18 and 30 for my answer
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3 years ago
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