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valkas [14]
3 years ago
15

What is f(3) if f(x) =2x+6

Mathematics
2 answers:
xeze [42]3 years ago
8 0
F(3) = 2(3)+6
f(3)= 6+6
f(3)=12

Hope this helps!
KiRa [710]3 years ago
7 0
Replace f(x) with y
Y=2x-6

Interchange the variables
X=2y-6

Solve for y
Y=3+x/2

F to the negative 1st power (x)=3+x/2
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Answer:

69

Step-by-step explanation:

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guapka [62]

Answer:

-5x + 3(10x - 8)= 51

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3 years ago
How to put -7/9 and -4/9 and 1/9 and 1/2 on a number line from least to greatest
WARRIOR [948]

Step-by-step explanation:

Take the LCM of the denominators:

=> LCM = 18

=> -7/9 x 2/2 = -14/18

=> -4/9 x 2/2 = -8/18

=> 1/9 x 2/2 = 2/18

=> 1/2 x 9/9 = 9/18

When the number is negative, the greater the number, the smaller it is.

So, -14 is smaller than -8.

< = smaller than

=> -14/18 < -8/18 < 2/18 < 9/18

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3 years ago
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A rectangular box with a square base is to be constructed from material that costs $9 per ft2 for the bottom, $4 per ft2 for the
mafiozo [28]

Answer:

V = 23.85 ft³

Step-by-step explanation:

The dimension of the square base = x ft by x ft

Height of box = y

Volume of the box, V = x^{2} y

Cost of top = $4 * x^{2}

Cost of the bottom =  $9 * x^{2}

Cost of the sides = $3 * 4xy

Total cost = 4x² + 9x² + 12xy

Total cost = 13x² + 12xy

Total cost = $193

193 = 13x² + 12xy

y = \frac{193 - 13x^{2} }{12x}

But volume, V = x²y

V = \frac{x^{2} (193 - 13x^{2}) }{12x}

V = \frac{x (193 - 13x^{2}) }{12}...................(1)

At maximum value, V' = 0

0 = \frac{193 - 39x^{2} }{12}

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x = 2.23

Put the value of x into (1)

V = \frac{2.23 (193 - 13*2.23^{2}) }{12}

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6 0
3 years ago
Give an example of a set of five ordered pairs. Determine the domain and range of the set.
sergey [27]

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DEFINE INPUT:

A number that'll be used in a function rule to determine the value of the output

RANGE:

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DEFINE OUTPUT:

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ORDERED PAIRS:

(-1, 7): -1 is the domain & 7 is the range

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(4, 9): 4 is the domain & 9 is the range

(-6, -10): -6 is the domain & -10 is the range

(-2, 8): -2 is the domain & 8 is the range


Hope this helps you!!! :)



8 0
3 years ago
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