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lesantik [10]
3 years ago
11

You practice piano for 50 minutes each weekday and for 40 minutes on each weekend day. how many hours per week do you practice?

Mathematics
2 answers:
Sunny_sXe [5.5K]3 years ago
8 0

Answer:

five and a half hours.

Step-by-step explanation:

50 minutes x 5 days = 250 minutes

40 minutes x 2 days = 80 minutes

250 +80 = 330 minutes

330 minutes/60 minutes in an hour =5.5

answer is 5:30 hrs

Pavel [41]3 years ago
5 0

Answer:

330 minutes a week

Step-by-step explanation:

50 x 5= 250 then add 80 because 40 x 2 is 80 and get 330

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saul85 [17]
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3 years ago
3 similar shirts and 4 similar jackets cost $360. 1 such shirt and 3 such jackets cost $220. Find the costof each shirt.
Lyrx [107]
3s + 4j = 360
1s + 3j = 220

This one we can solve using substitution, in that
s + 3j = 220 implies s = 220 - 3j (subtract 3j from each side).

Now substitute into the first equation:

3(220 - 3j) + 4j = 360.  Solve for jackets.
660 - 9j + 4j = 360  [Distributive property]
660 - 5j = 360 [Add -9j + 4j]
Subtract 360 from each side, and add 5j to each side.
660 - 360 - 5j + 5j = 360 - 360 + 5j
300 = 5j
Divide each side by 5.
$60 = price of a jacket.

Three of these plus a shirt runs $220.
3(60) = 180
180 + s = 220
180 - 180 + s = 220 - 180 [Subtract 180 from each side]
s =   40

Now we double check.
3(40) + 4 (60) = 120 + 240 = 360.  This satisfies the first equation.
We could check the second one too, but I'm satisfied.
4 0
3 years ago
One criticism of a stratified random sample is
Evgen [1.6K]
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3 years ago
Which expression is the best estimate of the product 7/8 8 1/18
Bess [88]

Answer:

7/8 is nearly 1, and 8 1/10 is obviously 8.1 (1/10), which is rounded to 8. So th expression that best estimates the products of those numbers is D, 1 * 8.

Step-by-step explanation:hope this helped

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Anne has worn a black shirt on 6 of the last 20 days. Considering this
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Answer:

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Step-by-step explanation:

Considering she wore a black shirt 6 times in 20 days will give you the statistic of 3/10. If the question is about the next 10 days then she will wear 3 black shirts. (It's also 1/2 of the original question.)

7 0
3 years ago
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