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MAVERICK [17]
3 years ago
12

Solving Rational Equations. LCD Method. Show work.

7B7%7D%7B2x%7D%20%3D%201" id="TexFormula1" title="\frac{2}{5x} +\frac{7}{2x} = 1" alt="\frac{2}{5x} +\frac{7}{2x} = 1" align="absmiddle" class="latex-formula">

Mathematics
2 answers:
Svet_ta [14]3 years ago
5 0

using the LCD method.... well, there are a couple of ways, but let's simply add them up.

well, the denominators are 5x and 2x... so the only LCD will just be 10x, since it's divisible by both, so let's use that one.

\bf \cfrac{2}{5x}+\cfrac{7}{2x}=1\implies \stackrel{\textit{LCD of 10x}}{\cfrac{(2)2~~+~~(5)7}{10x}}=1\implies \cfrac{4+35}{10x}=1\implies \cfrac{39}{10x}=1 \\\\\\ 39=10x\implies \cfrac{39}{10}=x\implies 3\frac{9}{10}=x

shutvik [7]3 years ago
3 0
The answer to the question

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LenaWriter [7]
24 yrs, might not be the answer

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3 years ago
Which expression is equivalent to 2cos2(StartFraction x Over 2 EndFraction) minus cosine (x)?
kati45 [8]

Answer:

B. 1

Step-by-step explanation:

Plug it in to a graphing calculator and you'll see.

Got it right on edge as well.

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I neeed helppp please help me
r-ruslan [8.4K]

Answers:

  • A) The equation is d = 2t
  • B) Independent variable = time; dependent variable = amount of cookies

=========================================================

Explanation:

The independent variable is always long the horizontal axis. Often this is x, but we are using t in this case.

The variable t represents the amount of time in minutes. For instance, t = 2 means 2 minutes have elapsed. At this time, 4 cookies have been eaten as shown by the point (2,4). As another example, the point (3,6) means that d = 6 cookies have been eaten at time t = 3 minutes.

The equation is d = 2t because the '2' represents the rate of change of "eating 2 cookies per minute". Whatever the time value (t) is, we double it to get the value of d, which is the number of cookies eaten.

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(Hope this helps you! Feel free to message me if you have any additional questions. :) Have a nice day!)
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