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2 years ago

11

on Saturday quentin will earn 15.00 more than 2 times the amount of money he earned on Friday. if quentin earned d dollars on Fr

iday, how much money did he earn on Saturday

1 answer:

Basile [38]2 years ago

6 0

$15 more, than twice Friday's earnings

d is how much he earned on Friday

s is how much he earned on Saturday

2d + 15 = s

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Solve the following equations.<br> log2(x^2 − 16) − log^2(x − 4) = 1

Alenkasestr [34]

Answer:

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Step-by-step explanation:

Let's rewrite the left side keeping in mind the next propierties:

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Now, cancel logarithms by taking exp of both sides:

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$-(x-4)*(-8-4e-2x+ex)=0$

Multiply both sides by -1:

$(x-4)*(-8-4e-2x+ex)=0$

Split into two equations:

$x-4=0\hspace{3}or\hspace{3}-8-4e-2x+ex=0$

Solving for $x-4=0$

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$x=4$

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$x(e-2)=4e+8$

Divide both sides by e-2:

$x=\frac{4*(2+e)}{e-2}$

The solutions are:

$x=4\hspace{3}or\hspace{3}x=\frac{4*(2+e)}{e-2}$

If we evaluate x=4 in the original equation:

$log(0)-log(0)=1$

This is an absurd because log (x) is undefined for $x\leq 0$

If we evaluate $x=\frac{4*(2+e)}{e-2}$ in the original equation:

$log(2*((\frac{4e+8}{e-2})^2-16))-log((\frac{4e+8}{e-2}-4)^2)=1$

Which is correct, therefore the solution is:

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3 years ago

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Trava [24]

Answer:

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Step-by-step explanation:

Given that,

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2 years ago