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frosja888 [35]
3 years ago
8

Find f(−2) given that f(x)=2x2−3x+7.

Mathematics
2 answers:
34kurt3 years ago
8 0

Answer:

21

Step-by-step explanation:

So we have the function:

f(x)=2x^2-3x+7

And we want to find f(-2).

To do so, substitute -2 for x. Thus:

f(-2)=2(-2)^2-3(-2)+7

Square:

f(-2)=2(4)-3(-2)+7

Multiply:

f(-2)=8+6+7

Add:

f(-2)=21

And we're done!

Sedaia [141]3 years ago
3 0

Answer:

21.

Step-by-step explanation:

f(x) = 2x^2 - 3x + 7.

When x = -2,

f(-2) = 2(-2)^2 - 3(-2) + 7

= 2(4) - (-6) + 7

= 8 + 6 + 7

= 21.

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Evaluate the following expression <br> 20/ 2 + 8
vitfil [10]

Answer:

18

Step-by-step explanation:

20/2 + 8

Divide the numerator and denominator by 2

20 / 2

2 / 2

Divide the numbers

10

2 / 2

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10 / 1

Any expression divided by 1 remains the same

10 + 8 = 18

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3 years ago
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Marina86 [1]

Answer:

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2 years ago
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Vesnalui [34]
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5 0
2 years ago
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Kim eats 1/3 of an apple in 1/6 minute.How many minutes will it take
klio [65]

Answer:

0.5 or 3/6 min

Step-by-step explanation:

so

1/3= 1/6min or 10 sec

to finish the whole apple 3/3 is required

1 part is 10 sec, 3 parts will be 30 secs which is 0.5 /3/6 min.

hope this helps

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3 years ago
Brainliest <br> Please do one of the above<br> (I would appreciate if you did more then one)
Temka [501]

Answer:

a) 52.5 ft. b)40.1ft c)12.5ft d) 72.6

Step-by-step explanation:

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tan58=84/x

find x by dividing 84 by tan58, and you get 52.5ft.

b) do the same thing, except 131 is in the base of the right triangle shape. That being said, do tan17=x/131.

multiply 131 by tan17, and you get x=40.1 feet.

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9/sin46= 12.5ft

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2 years ago
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