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3 years ago

1) Which is a quadratic function?

Mathematics

2 answers:

katovenus [111]3 years ago

7 0

It would have to be c. f(x) = 5x2 - 4x + 5

ZanzabumX [31]3 years ago

7 0

Answer:

f(x) = 5x² – 4x + 5 is quadratic function.

Step-by-step explanation:

Given : equations .

To find : Which is a quadratic function?

Solution : We have given that equations

We need to find which one is quadratic .

Standard form of quadratic function is f(x) = ax² + bx + c .

We can see from the given option f(x) = 5x² – 4x + 5 .

Here , a = 5 , b = -4 , c= 5

Therefore, f(x) = 5x² – 4x + 5 is quadratic function.

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Montano1993 [528]

Step-by-step explanation:

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3 years ago

Find the time required for an investment of $3000 to grow to $9000 at an interest rate of 6.5% per year, compounded quarterly. (

Vanyuwa [196]

Answer:

$t=17.04\ years$

Step-by-step explanation:

we know that

The compound interest formula is equal to

$A=P(1+\frac{r}{n})^{nt}$

where

A is the Final Investment Value

P is the Principal amount of money to be invested

r is the rate of interest in decimal

t is Number of Time Periods

n is the number of times interest is compounded per year

in this problem we have

$P=\$3,000\\A=\$9,000\\ r=6.5\%=6.5/100=0.065\\n=4$

substitute in the formula above

$9,000=3,000(1+\frac{0.065}{4})^{4t}$

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$3=(1.01625)^{4t}$

Apply log both sides

$log(3)=log[(1.01625)^{4t}]$

Apply property of logarithms

$log(3)=(4t)log(1.01625)$

$t=log(3)/[4log(1.01625)]$

$t=17.04\ years$

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AleksAgata [21]

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swap x and y

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xy^3 = 19

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then just replace y with f^-1(x)

$f(x) = \sqrt[3]{ \frac{19}{x} }$

hope this helped! have a good day ~ •lipika•

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