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NISA [10]
3 years ago
8

If f(x) = 7x2 - 4x, what is the value of f(2)? F -8 J 17 G 2 K 20 H 6

Mathematics
1 answer:
kow [346]3 years ago
4 0

Answer:

K 20

Step-by-step explanation:

f(x) = 7x2 - 4x

f (2) = 7 (2)^2 - 4(2)

= 28 - 8

= 20

Since they replaced the x inside f(x) with 2, just do that the same to the right side, change all x into 2

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WILL GIVE BRAINLIEST! Four expressions are shown below: A. 4(8x + 2) B. 4(7x + 3) C. 32x + 8 D. 28x + 12 Which two expressions a
kumpel [21]

Answer: A. 4(8x + 2), and C. 32x + 8

Step-by-step explanation:

Put the equations together and if they have infinitely many solutions they'll both be equal to each other.

CORRECT 4(7x + 2 + x)=4(8x + 2)

7x+2+x=8x+2

8x+2=8x+2 (Infinitely Many Solutions)

CORRECT 4(7x + 2 + x)=32x+8

4(8x+2)=32x+8

32x+8=32x+8

32x+8=32x+8 (Infinitely Many Solutions)

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8x+2=7x+3

8x=7x+1

8x−7x=1

x=1

INCORRECT 4(7x + 2 + x)=28x + 12

4(8x+2)=28x+12

32x+8=28x+12

32x=28x+4

32x−28x=4

4x=4

x=1

Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! As well as a great Valentines Day! :-)  

- Cutiepatutie ☺❀❤

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