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nika2105 [10]
3 years ago
7

If f(x) = 2x 2 + 3, find f(3). 31 15 21 39

Mathematics
2 answers:
Westkost [7]3 years ago
7 0
21 is the right answer goodluck
Mekhanik [1.2K]3 years ago
4 0

Answer: 21

Step-by-step explanation:

We are given a function f(x) = 2x^2 + 3

To find the value of f(3), we need to substitute x=3 in the given function, we get

f(3) = 2(3)^2 + 3\\\\\Rightarrow\ f(3)=2(9)+3..............[\text{Since}\ 3^2=9]\\\\\Rightarrow\ f(x)=18+3..............[\text{Since}\ 2\times9=18]\\\\\Rightarrow\ f(x)=21..........[\text{Addition property}]

Hence, the value of f(3) = 21.

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3 years ago
On a coordinate grid, AB has an end point B at (24, 16). The midpoint of AB is P(4, -3). What is the y-coordinate of Point A?
inysia [295]

The y-coordinate of point A is -22

Step-by-step explanation:

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B = (24,16)

P = (4,-3)

The formula for mid-point of AB will be given by:

P = (\frac{x_A+x_B}{2} , \frac{y_A+y_B}{2})

As we already know the y-coordinate of midpoint

We can put the formula's y coordinate equal to the given value

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Hence,

The y-coordinate of point A is -22

Keywords: Mid-point, coordinate geometry

Learn more about coordinate geometry at:

  • brainly.com/question/5565320
  • brainly.com/question/5720422

#LearnwithBrainly

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