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4 years ago

12

Lissette 's age is 3 years less than twice the age of her sister Francesca. Lissette is 13. Write an equation that can be used t

o find Francesca's age

2 answers:

mylen [45]4 years ago

8 0

Answer Is 8 not 5 16/2 = 8

PilotLPTM [1.2K]4 years ago

3 0

Let l= lisette's age and f=francesca's age

L=2f-3
L=13
so 13=2f-3
solve to get f=5

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3 years ago

Please help me find out what the question marks are

quester [9]

Question a

g(x) times $\sqrt{x-5}=\sqrt{x^2-5}$
divide both sides by √(x-5)
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$g(x)=\frac{(\sqrt{x-5})(\sqrt{x^2-5})}{x-5}$
$g(x)=\frac{\sqrt{x^3-5x^2-5x+25}}{x-5}$

question b
$g(x) \space\ times \space\ 1+\frac{1}{x}=x$
divide both sides by 1+1/x
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times by x/x
$g(x)=\frac{x^2}{x+1}$

question c
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question d
the (f*g)(x) collumn seems to have a domain of only x is greater than or equal to 0?
so maybe we squared the whole thing, ya
wait
ah, ya
basically
$|x|=(\sqrt{x})^2=(\sqrt{x})(\sqrt{x})$
so f(x)=√x

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b. $g(x)=\frac{x^2}{x+1}$
c. $f(x)=x^2$
d. $f(x)=\sqrt{x}$

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