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MariettaO [177]
3 years ago
6

Fast-Food Bills for Drive-Thru Customers A random sample of 49 cars in the drive-thru of a popular fast food restaurant revealed

an average bill of $18.90 per car. The population standard deviation is $5.90. Estimate the mean bill for all cars from the drive-thru with 93% confidence. Use a graphing calculator and round the answers to at least two decimal places.
Mathematics
1 answer:
sergeinik [125]3 years ago
6 0

Answer:

sample mean:: 17.92

ME = z*s/sqrt(n) = 1.8807*6.35/sqrt(47) = 1.7421

------------------------

Step-by-step explanation:

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zloy xaker [14]

Answer:

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Step-by-step explanation

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3 years ago
55 points see attachment below
Ludmilka [50]

Answer:

  f(3) = -20

Step-by-step explanation:

To find the value of a function, substitute the number for the variable and do the arithmetic.

  f(x) = -2x^2 +x -5 . . . . . . given

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4 0
2 years ago
Solve for x : 2x−3 = 5
neonofarm [45]

Answer:

x=4

Step-by-step explanation:

2x-3=5

Add 3 to both sides

2x=8

divide both sides by 2

x=4

3 0
4 years ago
Read 2 more answers
3y-x=3 and x is four times the value of y what is the value of x-y?
Aleonysh [2.5K]

Answer:

x - y = -9

Step-by-step explanation:

from the equation

3y - x = 3

and x is four times the value of y

i.e  x = 4y

put x  = 4y into the first equation

we have;

3y  - 4Y = 3

-Y = 3

Divide both sides by -1

we have

y = -3

so put y = -3 in the 2nd equation

i.e x = 4y

x = 4 × -3

x = -12

therefore x = -12 and y = -3

so tho find x - y

we have

-12 - (-3)

= -9

therefore x - y = -9

7 0
3 years ago
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