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3 years ago

X divided by x+3 equals 4 divided by x+5

Mathematics

1 answer:

noname [10]3 years ago

4 0

Answer:

x=-4, 3.

Step-by-step explanation:

x/(x+3)=4/(x+5)

cross product

4(x+3)=x(x+5)

4x+12=x^2+5x

x^2+5x-4x-12=0

x^2+x-12=0

factor out the trinomial,

(x+4)(x-3)=0

zero property,

x+4=0, x-3=0,

x=0-4=-4

x=0+3=3

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1 year ago

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2 years ago

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Step-by-step explanation:

We have the function, $f(x)=-2\sqrt{x-7}+1$ .

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That is, the domain is {x | x≥ 7}.

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3 years ago