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Sidana [21]
3 years ago
9

How much alcohol is there in 30 liters of a 45% alcohol solution?

Mathematics
2 answers:
zaharov [31]3 years ago
7 0

Answer:

Answer: 60%

Step-by-step explanation:

nadya68 [22]3 years ago
7 0

Answer:

13.5 Litres of alcohol

Step-by-step explanation:

45/100 * 30

0.45 * 30

=13.5

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Can you explain to me the answers in a and b?
Hoochie [10]

a. The constant of proportionality is k = 2

b. If Micah saves $150, his parents will give him $300

<h2>Explanation:</h2>

<h3>PART A.</h3>

From mathematics, we know that y varies directly as x or y is directly proportional to x if and only if:

y=kx for some nonzero constant k.

Here we know some facts:

  • For every $5 that Micah saves, his parents give him $10.

In other words:

Let y be the money his parents give him.

Let x be the money that Micah saves.

We \ know \ that: \\ y=kx \\ \\ \\ Solving \ for \ k: \\ \\ k=\frac{y}{x} \\ \\ k=\frac{10}{5} \\ \\ \boxed{k=2}

So,<em> the constant of proportionality is k = 2</em>

<h3>PART B.</h3>

In this case, we know that Micah saves $150. So we need to find the amount of his parents will give him. So what we know here is the value of x, because x represents the amount of money Micah saves. Therefore, by knowing x and k, we can calculate the value of y, which is the amount of money his parents will give him. Hence:

For \ x=150 \ and \ k=2: \\ \\ y=2(150) \\ \\ \boxed{y=300}

Finally, <em>if Micah saves $150, his parents will give him 300$</em>

<h2>Learn more:</h2>

Cost of pizzas: brainly.com/question/12878495

#LearnWithBrainly

5 0
3 years ago
Jon invests $4,100 into an account that pays 5 percent simple interest each year. What is the total balance in the account after
NemiM [27]
Y=.05x +4100
Y=.05(3)+4100
Y=.15+4100
Y=4100.15
8 0
3 years ago
GCF and LCM what is it and what do i have to do
kondor19780726 [428]
GCF is the Greatest Common Factor. It would be the largest number that can divide evenly into all the numbers you need to find the GCF in.

exapmple GCF for 12 and 16

12: 1, 2, 3, 4, 6, 12

16: 1, 2, 4, 8, 16

the largest common number is 4, so 4 is the GCF of 12 & 16


LCM = Least Common Multiple is the smallest number ( other than zero) that is a multiple of both

LCM of 3 and 5

3: 3, 6, 9, 12, 15, 18
5: 5, 10, 15, 20
 the first common number is 15, so this is the LCM of 3 & 5


6 0
3 years ago
How do I turn 0.002 into a fraction
Rom4ik [11]
Read it out loud, and put it into a fraction.
"two thousanths"
4 0
3 years ago
Read 2 more answers
Dose anyone know how to solve this?
Ghella [55]

Answer:

Domain = [-5, -2) U (1, 3)

Range = (-3, 4]

Step-by-step explanation:

Domain is the x values

Domain = [-5, -2) U (1, 3)

Range is the y values

Range = (-3, 4]

8 0
3 years ago
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