Consider the function f(x) = 2x^2 - 4x + 9. Evaluate 2f(3) + 3f(-3).

Answer: 147

Step-by-step explanation:

To evaluate 2f(3)+3f(-3), we first need to find the values of f(3) and f(-3). Given f(x), we just plug in x=3, -3 into f(x).

f(3)=2(3)²-4(3)+9         [exponent]

f(3)=2(9)-4(3)+9          [parenthesis]

f(3)=18-12+9                [subtract]

f(3)=6+9                       [add]

f(3)=15

Now, we find f(-3).

f(-3)=2(-3)²-4(-3)+9      [exponent]

f(-3)=2(9)-4(-3)+9         [parenthesis]

f(-3)=18+12+9               [add]

f(-3)=30+9                    [add]

f(-3)=39

With the values of f(3) and f(-3), we can evaluate the expression.

2(15)+3(39)                  [multiply]

30+117                          [add]

147

Now, we know the value is 147.

un carpintero tiene un listón de 12metros de longitud. quiere dividirlo en trozos iguales que midan siempre un numero exacto de metros. De cuántas maneras puede hacerlo?

can someone help me out? :P

Suppose you want to buy bouquets of flowers for a party. An equation that represents the cost, y, in dollars, for x bouquets is y=22x. Decide if this equation represents a proportional relationship. Explain your answer.

Simplify:

–23.9a + 46.8 + 42.6a – 26b – 18.7a
A. 52a – 26b + 46.8
B. –26b + 46.8
C. –18.7a – 26b + 46.8
D. 23.9a – 26b + 46.8

HELP!! I WILL GIVE YOU BRAINLIEST!!!

A candle burns down at the rate of 0.5 inches per hour. The original height of the candle was 9 inches.

Part A: Write a list of 6 ordered pairs to show the height of the candle in inches (y) as a function of time in hours (x) from the first hour after it started burning. For example, the point (0, 9) would represent a height of 9 inches after 0 hours. Explain how you obtained the ordered pairs. (5 points)

Part B: Is this relation a function? Justify your answer using the list of ordered pairs you created in Part A. (2 points)

Part C: If the rate at which the candle burned was 0.45 inches per hour instead of 0.5 inches per hour, would the relation be a function? Explain your answer using input and output values. (3 points)

Help?
( this is not from a quiz. )
( also, this is science. )

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B. Match the grooves along the coastlines of continents

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I need hlp
Explain your reasoning

Which equation is true? *

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406 x 10^3=406,000
915 x 10^4 = 915,000
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Please help ASAP I will also give brainiest :)

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PLS HELP BTW DON'T JUST DO IT FOR THE POINTS!!
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HELP I AM TIMED W WILL MARK BRAINLEST
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Please answer question correct.

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HELP WILL GIVE BRAINLEST FOR CORRET ASWER