3 years ago

How many liters of 60% alcohol solution should be added to 40 liters of a 20% alcohol solution to make a 50% solution?

SAT

1 answer:

IgorLugansk [536]3 years ago

7 0

Exactly 80 liters of 20% are needed.

Let quantity of 20% alcohol solution be added : x liters

Here is the work:

> x*20% + 40 * 50% = (x+40) * 30%

> x*0.2 + 40*0.5 = (x+40)*0.3 ..(converting percentages into decimal)

> 0.2x + 20 = 0.3x + 12

> 20-12 = 0.3x - 0.2x (Rearranging similar terms)

> 8 = 0.1 x

Hence x = 8/0.1

Ans 80 Litres

You might be interested in

)Alex used to spend two hours a day playing video games after school. He has replaced one of the video game playing hours with a

gayaneshka [121]

He will be more healthy

3 0

3 years ago

Read 2 more answers

Payton collected data to show the relationship between the number of hours he practices and the number of errors he makes when p

aivan3 [116]

Answer:

-4.5

Explanation:

6 0

3 years ago

Read 2 more answers

An increase in atomic number is related to an increase in atomic mass because

trapecia [35]

Answer: more protons are present in the atomic nucleus

8 0

2 years ago

The toll on a bridge is $1. 00 for cars and $2. 50 for trucks. In one hour, a tollbooth operator collects a total of $105 in tol

Anit [1.1K]

Answer:

what is the question? is it supposed to be a graph?

8 0

3 years ago

Therapies aimed mainly at understanding one's thoughts, feelings, and behaviors are referred to as ________.

maw [93]

Therapies aimed mainly at understanding one's thoughts, feelings, and behaviors are referred to as Cognitive behavioral therapy (CBT)

<h3>What is Therapy?</h3>

This refers to the treatment that is given to a person for a mental problem that stems from stress, abuse, etc.

Hence, we can see that based on the type of therapy that is used to understand the thoughts and feelings of a person in order to give them treatment is known as Cognitive behavioral therapy (CBT)