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Ratling [72]
3 years ago
9

Grace orders 3 large pizzas and 2 medium pizzas. Each large pizza cost $1.25 more than a medium pizza. If The total was $52.50.

What is the equation to solve this
Mathematics
1 answer:
melisa1 [442]3 years ago
6 0

Answer:

(3l + (3)1.25) + 2m = 52.50

Step-by-step explanation:

(3l + (3)1.25) + 2m = 52.50

3*9.75  + 3.75 + 2*9.75

(29.25 + 3.75) + 19.50

33.00 + 19.50 = 52.50

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Answer:

The 99% confidence interval for the mean number of hours of part-time work per week for all college students is between 25.8 and 30.2.

Step-by-step explanation:

A confidence interval has the following format.

\mu_{x} \pm M

In which \mu_{x} is the mean of the sample and M is the margin of error.

In this problem, we have that:

\mu_{x} = 28, M = 2.2

\mu_{x} - M = 28 - 2.2 = 25.8

\mu_{x} + M = 28 + 2.2 = 30.2

The 99% confidence interval for the mean number of hours of part-time work per week for all college students is between 25.8 and 30.2.

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