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seraphim [82]
3 years ago
13

If 15 mL of medicine must be mixed with 180 mL of water, how many mL of medicine must be mixed in 230 mL of water?

Mathematics
1 answer:
Andrei [34K]3 years ago
5 0

Answer:

19 1/6

Step-by-step explanation:

Because 15 divided by 180 is 0.08333333333.

times that by 230 = 19.166666666 or 19 1/6

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andrew11 [14]
4/5 x 1 1/6 
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<span>= 28/30 </span>
<span>= (28 ÷ 2)/(30 ÷ 2) </span>
<span>= 14/15</span>
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The length of a rectangular deck is 4 times it’s width. If the deck’s perimeter is 30ft, what is the deck’s area?
ioda

Try this solution (note, this is not the shortest way):

1. if the given length is 'l' and the width is 'w', then according to the condition 4*l=w;

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3. if to substitute '4*l' instead of 'w', the formula of the perimeter (from item no. 2) will be as 2(4*l+l)=30 or 10*l=30 ⇒ l=3 ft. The length is 3 ft.!

4. if l=3 ft., then w=4*3=12 ft. The width is 12 ft.!

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7 0
3 years ago
Solve the equation by completing the square. Round to the nearest hundreth if necessary. x^2-x-7=0
gregori [183]
X^2 - x  = 7
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(x - 0.5)^2 = 7.25
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Answer:

$21.33

Step-by-step explanation:

If the waiter earns $128 for 6 hours, divide 128 by 6.

21.33...

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2 years ago
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