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Greeley [361]
3 years ago
12

Which of the following units are most commonly used in the United States?

Mathematics
1 answer:
igomit [66]3 years ago
5 0

The correct answer is C, miles.

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How do you do this??
astra-53 [7]

welll...you have there written just one relationship...it is berween 280 and 4 hours...you have to figure out speed:

280 \div 4 = 70

it is speed per hour

then you just connect time and speed:

  1. 140 - 2
  2. 280 - 4
  3. 350 - 5
  4. 420 - 6
  5. 560 - 8
  6. 700 - 10
6 0
3 years ago
Could someone help me please thank you
lara31 [8.8K]

Answer:

5

Step-by-step explanation:

7 0
3 years ago
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1. A new brand of hot dog claims to have a lower sodium content than the leading brand.
kherson [118]

Answer:

(a) Population mean = 314.5mg

(b) Margin of error = 21.281mg

(c) No, 350mg is not a plausible value

The new brand of hot dog has a lower sodium content on average than the leading brand

(d) Yes

Step-by-step explanation:

(a) Population mean = (370+326+322+297+326+289+293+264+327+331)/10 = 3145/10 = 314.5mg

(b) Margin of error = t×sd/√n

sd = 29.73, n = 10, degree of freedom = n-1 = 10-1 = 9

Assuming 95% confidence level

t-value corresponding to 9 degrees of freedom and 95% confidence level is 2.262

Margin of error = 2.262×29.73/√10 = 21.281mg

(c) No

Lower limit of new brand = 314.5 - 21.281 = 293.219mg

Upper limit = 314.5 + 21.281 = 335.781mg

The range of sodium content for the new brand of hot dog is between 293.219mg and 335.781mg which is lower than the leading brand (350mg)

(d) Margin of error = t×sd/√n

From the formula above, margin of error varies inversely as the square root of sample size

The smaller the sample size (n = 10) the larger the margin of error and the less accurate is the population mean

The larger the sample size (n = 40) the smaller the margin of error and the more accurate is the population mean

8 0
3 years ago
Solve for y.<br> -16y - 7y + -5 = 18<br> Y =
Anton [14]

Answer: y = - 1

Step-by-step explanation:

  1. Combine the like terms. -23y - 5 = 18
  2. Add 5 on both sides. -23y = 23
  3. Divide -23 on both sides. y = - 1
4 0
3 years ago
Read 2 more answers
6[ 5x (41-36) - (8+14)]
IgorLugansk [536]

Answer:

=18

Step-by-step explanation:

3 0
3 years ago
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