3 years ago

What is the best estimate of the mean price of all the sunglasses on the rack?

2 answers:

7 0

The mean of the sample is
(12 +12 +14 +15 +18 +20 +20 +25)/8 = 136/8 = 17

The best estimate of the mean of the population is
$17

Morgarella [4.7K]3 years ago

5 0

$17 is the answer to this problem
.

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you bought 4 bananas and 5 apples at the store for $2.50 the next day you bought 10 bananas and 3 apples at the store for $3.40.

PIT_PIT [208]

Bananas cost: $0.25
Apples cost: $0.30

4b+5a=2.50
10b+3a=3.40
You multiply the equations by the variables so they can cancel out. For example the first one by 3 and the second by 5 so you have

12b+15a=7.50
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Subtract them and end up with

-38b=-9.5
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3 years ago

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Elanso [62]

Answer:

Detailed step wise solution is given in the the attached images.