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Len [333]
3 years ago
12

How many liters of a 60% acid solution must be added to 12 liters of a 20% acid solution to produce a 36% acid solution

Mathematics
1 answer:
inn [45]3 years ago
5 0
I believe the answer should be 3
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Factor <img src="https://tex.z-dn.net/?f=36x%5E%7B4%7D%20-4y%5E%7B2%7D" id="TexFormula1" title="36x^{4} -4y^{2}" alt="36x^{4} -4
irinina [24]
Sorry for the hand writing. But you want to factor out a 4y^2 which will result in (9y^2-1). Then you will factor out the equation in parentheses to (3y-1)(3y+1). Don’t forget to put the 4y^2 out front!

8 0
3 years ago
Read 2 more answers
Dennis has 9.5 weeks to prepare for a bike tour If he rides 8.2 miles each week how many miles will he ride before the bike tour
emmasim [6.3K]
If you have to show your work...

8.2 x 9.5 

    8.2
 x 9.5
-----------
     410
+ 7380
-----------
   7,790 miles

hoped this helped.
6 0
3 years ago
In a class of 40 students, everyone has either a pierced nose or a pierced ear. The professor asks everyone with a pierced nose
viktelen [127]

Answer:

3 students

Step-by-step explanation:

If everyone in the class has either a pierced nose or ear, we just simply have to add up the total number of hands raised and minus the number of students in the class.

35+8=43

43-40=3

3 students have both a pierced nose and pierced ear.

6 0
3 years ago
What is the constant of proportionality?
Mars2501 [29]

Answer:

The constant of proportionality is the ratio between two directly proportional quantities. Two quantities are directly proportional when they increase and decrease at the same rate. The constant of proportionality k is given by k=y/x where y and x are two quantities that are directly proportional to each other.

Step-by-step explanation:

hope this helps if do mark brainllest pls

4 0
2 years ago
Read 2 more answers
The calculation of the mean of a population and the expected value of the probability mass function of a Random Variable (RV) ar
Zanzabum

Answer: Hello the options related to your question is missing attached below are the missing options.

A.) The probabilities of the RVs may be equal

B.) The sum of the probabilities of the RVs exceed 1

C.) This is an impossible occurrence

D.) The probabilities of the RVs must be equal

E.) None of the above

answer:

The probabilities of the RVs may be equal ( A )

Step-by-step explanation:

Given that the value of the  population mean and the value of probability mass function of a set of random variables are similar

For the Random Variables : 100,200,300,400

The Probability mass function of RV = ( 100 + 200 + 300 + 400 ) / 4

Hence  The probabilities of the RVs may be equal

3 0
3 years ago
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