If a nurse has 20% alcohol solution and 70% alcohol solution, but needs 15 liters of a 40% alcohol solution, how do you think the nurse should proceed? Let’s use a system of linear equations and two different ways of solving this system of equations. First, we need to identify our variables, since we need to find out how much 20% alcohol solution (let’s call it Mixture A) and how much 70% alcohol solution (let’s call it Mixture B) we need.

Since our final mixture is a total of 15 liters, our first equation is A + B = 15.
Since our final mixture should have 40% alcohol solution, we need 6 liters of alcohol (.40*15) our second equation is 0.20A + 0.70B = 6.
Your job: Solve this system of equations for variables A and B by (1) graphing and by (2) either the substitution or substitution.

answer: sorry

step-by-step explanation: can you tell me pls how to find the rational of two integers

median is the value separating the higher half of a data sample, a population or probablity distribution from the lower half.

step-by-step explanation:

say you have 3,8,7,3,1,9,8 order them from lowest to highest

if orderd it would be 1,3,3,7,8,8,9 now you take away from the lowest and the highest until you end up in the middle.

so you would remove the 1 and 9 leaving you with 5 digits remaining

when you've reached the middle that would be your answer so in this case the answer is 7

if there were two numbers left say 7 and 5 you'd and them together so 12 then divide by 2 witch would equal 6 so the answer would be 6

good luck on that project hoped i you at all

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both graphs increase on their domain

neither graph has a y-intercept

step-by-step explanation:

the following points can be visualized easily from the graph