3 years ago

Which point is an x-intercept of the quadratic function f(x)= (x-8)(x+9)?

Mathematics

1 answer:

Brums [2.3K]3 years ago

4 0

Answer:D

Step-by-step explanation:

-9+9=0

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Write this trinomial in factored form 2a^2 +7a+3

EleoNora [17]

Answer:

(2a + 1)(a + 3) = 2a² + 7a + 3

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3 years ago

Joe has an ice cream stand. last week he spent $85 for ice cream and supplies. he earned $125. what was his profit?

Elodia [21]

Answer:

40 dollars

Step-by-step explanation:

Profit is what he earned minus his costs

Profit = 125 -85

Profit = 40

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2 years ago

Cynthia invests some money in a bank which pays 5% compound interest per year. She wants it to be worth over £8000 at the end of

Agata [3.3K]

$\bf \qquad \textit{Compound Interest Earned Amount}\\\\A=P\left(1+\frac{r}{n}\right)^{nt}\quad \begin{cases}A=\textit{accumulated amount}\to &8000\\P=\textit{original amount deposited}\\r=rate\to 5\%\to \frac{5}{100}\to &0.05\\n=\begin{array}{llll}\textit{times it compounds per year}\\\textit{is only once, so}\end{array}\to &1\\t=years\to &3\end{cases}$

$\bf 8000=P\left(1+\frac{0.05}{1}\right)^{1\cdot 3}\implies 8000=P(1.05)^3\implies \cfrac{8000}{1.05^3}=P\\\\\\6910.70\approx P\implies \stackrel{\textit{rounded up}}{6911 = P}\qquad therefore\qquad 6911~~\leqslant ~~P$