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Elza [17]
4 years ago
13

Explain why multiplying both sides of a rational equation by the LCD eliminates all of the denominators. (please help it’s extra

credit for a failing grade)
Mathematics
2 answers:
kondaur [170]4 years ago
8 0

Answer:

The answer id D

Step-by-step explanation:

serg [7]4 years ago
7 0

because all of the denominations are able to divide with it and generate integer numbers for it:

for example:

\frac{1}{2} x + 3 =  \frac{2}{3} x - 1 \\ lcd \: eliminate = 2 \times 3 = 6 \\

so when you multiply 6 to the both sides of this equation we have:

3x + 18 = 2x - 6

so you can find the solution:

x= -18-6=-24

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sergey [27]

Answer:

12. 6.4

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Step-by-step explanation:

This is the Pythagorean theorem, which says a^2+b^2=c^2. So for problem 12 we have 4^2+5^2=c^2. Since, 16+25=41, c=sqrt41 which is about 6.4. For problem 13 we have 15^2+b^2=25^2. Since 25^2-15^2=400, b=sqrt400 which is 20. Hope this helps!

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