3 years ago

-7x^2+14x+21=0answer?

Mathematics

1 answer:

scoray [572]3 years ago

6 0

Answer:

7(−x−1)(x−3)

Step-by-step explanation:

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Kelly buys a sweater for $16.79 and a pair of pants for $28.49. She pays with a $50 bill. How much change should Kelly get back?

andrew11 [14]

16.79+28.49=45.28

50-45.28=4.72

Kelly would get $4.75 back

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2 years ago

Dan made $5000 in taxable income last year.

storchak [24]

well, we know is 10% for the first 7500, but Dan only made 5000 of taxable income, so he's in that range of 0 - 7500, so he only gets to pay 10% of 5000.

$\begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{10\% of 5000}}{\left( \cfrac{10}{100} \right)5000}\implies 500$