3 years ago

Food bill before tax: $30Sales tax: 6.4% Tip: 15%Please help!

1 answer:

4 0

$30 x 0.064 = 1.92
$31.92 x .15 = 4.788
$31.92+4.788=
$36.708
Answer is $36.71

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Eduardwww [97]

Answer:

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Step-by-step explanation:

Consider the expression

$\dfrac{3x^3-15x^2+15x-75}{3x^2+15}$

Its numerator $3x^3-15x^2+15x-75$ is equivalent to

$3x^3-15x^2+15x-75\\ \\=3x^2(x-5)+15(x-5)\\ \\=(x-5)(3x^2+15)$

Therefore, given expression can be rewritten as

$\dfrac{(x-5)(3x^2+15)}{3x^2+15}=x-5$

Note that $3x^2+15\neq 0,$ so we can divide the numerator and the denominator by non-zero expression $3x^2+15.$

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