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Genrish500 [490]
4 years ago
5

a pharmacist has a 10% alcohol solution and a 25% alcohol solution. How many milliliters of each solution will she need to mix t

ogether in order to have 200 mL of a 20% alcohol solution?​
Mathematics
1 answer:
Paul [167]4 years ago
4 0

x = volume of 10% solution to use in the mixture

y = volume of 25% solution to use

She wants a 200 mL solution, so x + y = 200.

The first solution contributes 0.10x mL of alcohol, while the second contributes 0.25y mL. Together, they make a solution with 0.20(x + y) = 0.20(200) = 40 mL of alcohol.

\begin{cases}x+y=200\\0.10x+0.25y=50\end{cases}\implies x=\dfrac{200}3,y=\dfrac{400}3

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Answer:

slope: 2.7

y-intercept: (0,8)

Step-by-step explanation:

In the form y = mx + b, m is the slope and b is the y-intercept.

7 0
3 years ago
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A carnival game allows a group of players to each draw and keep a marble from a bag. The bag contains 5 gold marbles, 25 silver
laila [671]
1. What’s the probablity of a second person winning the small prize?
There are now 99 total marbles, and 24 silver marbles. So, 24/99 is 0.24 probability.
2. Which player is most likely to win a big prize?
Since each player draws a silver marble (aka a small prize) there are less small prize marbles in the bag after each turn. So, the first person would have a 5% chance (or 0.05)of winning the big prize gold marble, but the last person would have a slightly bigger chance (5.15% or 0.0515) of winning a big prize.
3. How could the game be made fair for each player?
Well it’s quite simple, just have each player return their marble and the number of marbles would be kept constant, giving everyone an equal chance. Or you could have them all play at the same time, either way.
4. Same answer as 3
3 0
4 years ago
The topic is about operations on functions: composition and transformation
telo118 [61]

Answer:

5, 1, 5, 1.

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take it one step at a time.

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first do whats inside of the parenthesis.

> g(1), go to g(x) graph, go to x= 1 and your y-value is your new value (3)

> your new equation is now f(3)

→ go to f(x) graph, go to x= 3, your y-value is 5. Your final answer is 5.

5 0
3 years ago
Sally bought a sprinkler that squirts in a circular direction. With the center of the sprinkler as the center, it sends out wate
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Answer:

37% of the backyard will not be covered by the water from the sprinkler.

Step-by-step explanation:

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= 3.1416*(20)^2

= 3.1416*400

= 1256.64

Area of yard = 40 ft * 50 ft

= 2000

Percent covered by the water = 100*(area of circle/area of yard)

= 100*(1256.64/2000)

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3 years ago
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Alika [10]

Answer:

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Step-by-step explanation:

7 0
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