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qwelly [4]
3 years ago
6

This data represents the number of oil changes completed each day last week at Jeff's Auto Center. 19, 16, 24, 12, 16, 21, 18 Wh

at is the mean of this data set?
Mathematics
1 answer:
geniusboy [140]3 years ago
6 0
19 + 16 + 24 + 12 + 16 + 21 + 18 = 126
126/7 = 18

18 is the mean of the data set.
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You need 3/4 yard of ribbon for one gift box. You have 3 yards of ribbon. How many gift boxes do you have ribbon for
Kazeer [188]

Answer:

4

Step-by-step explanation:

You take 3/4 + 3/4 and add it. That equals 1.5, so you take 3/4+ 3/4 again and you get 1.5 . So, 1.5+1.5 is 3. So that's how you get your total of 4 boxes.

7 0
3 years ago
A piggy bank contains a nickels, dimes and quarters. There are five more dimes than nickels and twice as many quarters as dimes.
Natasha2012 [34]

Answer:

34 nickels, 39 dimes, 78 quarters

Step-by-step explanation:

q = quarters, d = dimes, n = nickels

n = d - 5

q = 2d

.25q + .10d + .05n = 7.55

<em>Plug in the first 2 equations into the third one</em>

.5d + .10d + .05(d - 5) = 7.55

<em>Open up the Parenthesis</em>

.5d + .10d + .5d - .25 = 7.55

<em>Combine Like Terms</em>

.2d - .25 = 7.55-->

.2d = 7.8 -->

d = 39 -->

n = 39 - 5 = 34

q = 2(39) = 78

4 0
3 years ago
Elijah earns $18,400 per year. Approximately 25% of his income
Thepotemich [5.8K]

Elijah earns $18,400 per year. Approximately 25% of his income

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If the value of b is 7, then what is the value of the expression -3b2 + 25 = ?
jenyasd209 [6]
I got -17, so if you are answering in absolute values then C.17 is correct
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3 years ago
Jennie ran the first 6 miles of a marathon
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58/6 =9.67 ( the time she runs 1 mile)
9.67 x 26.2 = 253 min
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