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bearhunter [10]
3 years ago
7

Le help wanted for variables part two

Mathematics
2 answers:
Lerok [7]3 years ago
4 0
The coefficient is -9
disa [49]3 years ago
3 0
The coefficient for the first question is c and the coefficient for the second question is gh
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A chemist wants to make 100 liters of a 44% acid solution. She has solutions that are 20% acid and 60% acid.
alexgriva [62]

the first solution is 20% acid, and say we'll be using "x" liters, so how many liters of just acid are in it?  well 20% of "x" or namely 0.2x.  Likewise for the 60% acid solution, if we had "y" liters of it, the amount of only acid in it is 0.6y.

\begin{array}{lcccl} &\stackrel{solution}{quantity}&\stackrel{\textit{\% of }}{amount}&\stackrel{\textit{liters of }}{amount}\\ \cline{2-4}&\\ \textit{1st solution}&x&0.20&0.2x\\ \textit{2nd solution}&y&0.60&0.6y\\ \cline{2-4}&\\ mixture&100&0.44&44 \end{array}~\hfill \begin{cases} x+y=100\\\\ 0.2x+0.6y=44 \end{cases}

x+y=100\implies y=100-x~\hfill \stackrel{\textit{substituting on the 2nd equation}}{0.2x+0.6(100-x)=44} \\\\\\ 0.2x+60-0.6x=44\implies -0.4x+60=44\implies -0.4x=-16 \\\\\\ x=\cfrac{-16}{-0.4}\implies \boxed{x=40}~\hfill \boxed{\stackrel{100-40}{y=60}}

7 0
2 years ago
2. In a relationship between variables, what is the variable called that changes in response to
valkas [14]

Answer:

A dependent variable

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is a variable whose value will change depending on the value of another variable, called the independent variable. Dependent variables are also known as outcome variables, left-hand-side variables, or response variables.

4 0
3 years ago
Lily earns $29.75 an hour. If she works 6 hours each day during the week and 4 hours a day
rosijanka [135]

Answer:

the answer is $1062.10

Step-by-step explanation:

explanation above

6 0
2 years ago
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frozen [14]

Answer:

Cylinder A= 603.81

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Step-by-step explanation:

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3 years ago
when gail goes on a hike she always packs a ratio of 20 protien bars to 15 water bottles in her backpack . for a short hike ,gai
dimulka [17.4K]

Answer:

  4 bars

Step-by-step explanation:

Gail's ratio of bars to bottles is ...

  20 : 15 = 4 : 3

For 3 bottles, she should pack 4 bars.

8 0
3 years ago
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