Solve 4x + 13 >15 PLEASE HELP!!!

Mathematics

2 answers:

omeli [17]3 years ago

7 0

Try .2 and see if it works.

Tom [10]3 years ago

6 0

Basic in equality, subtract 13
4x>2
divide by 4
x>2/4
x>1/2.
Check by plugging in x greater than 1/2
with x=1, 17>15
x>1/2

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Write the divide fraction horizontally:
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$= \dfrac{x+3}{4x^2-16} \div \dfrac{2x^2+10x+12}{2x-4}$

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Factorise the numerators and denominators when possible:
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$= \dfrac{x+3}{4(x+2)(x-2)} \div \dfrac{ 2(x + 3) (x + 2)}{2(x-2)}$

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Convert the divide fraction to multiplication fraction
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$= \dfrac{x+3}{4(x+2)(x-2)} \times \dfrac{2(x-2)}{2(x+3)(x+2)}$

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Cancel the factors
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$= \dfrac{1}{4(x+2)} \times \dfrac{1}{(x+2)}$

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Combine to single fraction
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$= \dfrac{1}{4(x+2)^2}$

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