Dilution ProblemSamantha needs 115 liters of a solution that has a concentration of 14 g/ml for the manufacture of computer parts.
Samantha has an unlimited supply of a solution with a concentration of 21 g/ml.
Using the Formula C1×V1 = C2×V2 to answer the following questions
Round answers to the nearest 10th.

How many liters of 21 g/ml does Samantha need to equals the amount of soluble in the given solution?
(Concentration times Volume = grams of soluble, like salt)​


Answer 1


  76.7 liters

Step-by-step explanation:

You have ...

  C1×V1 = C2×V2

so ...

  V2 = V1×(C1/C2) = (115 L)×(14/21) = 76 2/3 L

  V2 ≈ 76.7 L

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Idk how to solve this find value of x and y
Q1: A group of 50 biomedical students recorded their pulses rates by counting the number of beats for 60 seconds. (15)804888708482668482644472907086104588472609010862527286661047882965468767288102746874786672906210092847672(a) Construct frequency distribution.(b) Compute mode, median and mean of the frequency distribution.(c) The lower and upper quartile of the frequency distribution.
Which is an example of a situation that is in equilibrium?A. The amount of air in a room increases quickly when the door isopened.B. The amount of money in a bank account never changesC. The amount of water in a cup decreases as it evaporatesD. A flower slowly grows taller​
Kjsdfjyrbasdhviurhasiudhvr = ?
8x + 4y= 12 2x+ y= 3

luis read a 300 page book in 6 days on the first day he read 120 pages each day after that he read the same amount of pages writ the equation that can be determined the number of pages read on each day after rhe first day


120+(XN)= 300 
this should be the correct answer
x= pages read per day
n= number of days

Please only answer if you actually know how to). Some methods for graphing equations work well with certain equations and some don't. Help Asap). Knowing which method to select based on the given equation is a valuable skill. You have learned three methods to graph equations. These methods are: • y = mx+ b, • find intercepts, • use a t-chart. A) Using the following 3 equations, answer the questions: 11x + y =4, x+y = -2, x - 2y = 18. 1) How can you determine which equations can be graphed more easily using x - and y -intercepts, rewriting in slope-intercept form, or using a table of values? 2) Which method works best for you personally? When does it not work as well?​



please dont blame me if i get this wrong this is what i put.

Step-by-step explanation:

Using the following 3 equations, answer the questions:

11x + y =4, x+y = -2, x - 2y = 18

How can you determine which equations can be graphed more easily using x- and y-intercepts, rewriting in slope-intercept form, or using a table of values?

you can determin which is eiser to graph by wether or not they have numbers infront of the x and y intercepts.  i find it mutch eiser if they allready have the numbers there. its also eiser to graph 11x + y =4 and x - 2y =18 on a slope intercept rather than table of values because you allready can find the points for those two eiser than the last one which would be used on the table of values.  for the problem x+y=-2 you would use x and y intercepts. for 11x+y=4, rewriting in slope form is the corect method to use. and finaly use the table of values method for x-2y=18.

Which method works best for you personally? When does it not work as well?

the one that i find works best for me personally is probably gonna be the slope intercept method as apposed to many other methods. it doesnt work all the time because nothing can but normaly when i have a problem with this method i can just go to the table of values method and get the answer. (sorry if this is wrong this is what im putting for my answer. dont copy and paste this though if u do desiede to use it, read it and turn it into your own words so its not obvious you found the answer on the internet. and tbh i didnt read the lesson i just am ok at comming up with answers useing the question and getting away with it. )

(4r2 – 3r + 2) – (-r2 – 3r) =




Step-by-step explanation:

(4r^2 – 3r + 2) – (-r^2 – 3r) =

Distribute the minus sign

(4r^2 – 3r + 2)  +r^2 + 3r =

Combine like terms

(4r^2 + r^2 – 3r+ 3r + 2) =


On a test a student got 15 problems correct out of a total of 20 problems.What percent did the student get incorrect?


Divide 15 by 20

15 divided by 20 is 75%

Final answer:

To calculate the percentage of incorrect answers, subtract the correct answers from the total amount, resulting in 5 incorrect answers. Then divide the incorrect answers by the total problems, multiplied by 100, giving us 25% incorrect.


The subject is the calculation of percentages, specifically determining what percent of the test problems a student got incorrect. To find the answer, first subtract the number of problems the student got correct (15) from the total number of problems on the test (20). This gives you 5 incorrect answers. Then, to convert this number into a percentage, divide the number of incorrect problems (5) by the total number of problems (20) and multiply by 100. This gives an answer of 25%. So, the student got 25% incorrect on the test.

Learn more about Percentage Calculation here:



Elizabeth gave 13% of the cost as a tip to the delivery person who delivered her car after service at a cost of $294. What will be the total cost with tip to the nearest cent?



If an amount is included as a "Gratuity" or "Service Charge," tipping is not required. ... If the tip is included, the breakdown of the bill will read "gratuity" or "service charge," which means that a tip is already included.

Step-by-step explanation:

hope this helps!

The solution to the system -2x+5y=-15 and 5x+2y=-6 is what


Step-by-step explanation:

−2x+5y=−15 and 5x+2y=−6

Rewrite equations:


Step: Solve−2x+5y=−15for x:


−2x+5y+−5y=−15+−5y(Add -5y to both sides)


−2x−2=−5y−15−2(Divide both sides by -2)


Step: Substitute52y+152forxin5x+2y=−6:



292y+752=−6(Simplify both sides of the equation)

292y+752+−752=−6+−752(Add (-75)/2 to both sides)


292y292=−872292(Divide both sides by 29/2)


Step: Substitute−3foryinx=52y+152:



x=0(Simplify both sides of the equation)


x=0 and y=−3