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Marrrta [24]
2 years ago
15

Solve 6x + 3) = 21.

Mathematics
1 answer:
LiRa [457]2 years ago
8 0

Answer:

18x^2 - 9

Step-by-step explanation:

y = f(x)= 6x^3 - 9x + 4

dy/dx = d/dx(6x^3) - d/dx(9x) + d/dx (4)

=6.d/dx(x^3) - 9.d/dx (x) + d/dx. (4)

=6.3x^2 - 9.1 + 0 =18x^2 - 9

You might be interested in
-2(x - 8) + 4x = -12
Deffense [45]

Answer:

x = 14

Step-by-step explanation:

Solve for x:

4 x - 2 (x - 8) = -12

-2 (x - 8) = 16 - 2 x:

4 x + 16 - 2 x = -12

4 x - 2 x = 2 x:

2 x + 16 = -12

Subtract 16 from both sides:

2 x + (16 - 16) = -16 - 12

16 - 16 = 0:

2 x = -16 - 12

-16 - 12 = -28:

2 x = -28

Divide both sides of 2 x = -28 by 2:

(2 x)/2 = (-28)/2

2/2 = 1:

x = (-28)/2

The gcd of -28 and 2 is 2, so (-28)/2 = (2 (-14))/(2×1) = 2/2×-14 = -14:

Answer:  x = -14

7 0
2 years ago
Help me ASAP PLZZZZZ
jarptica [38.1K]

Answer:

what question do u need help with???


Step-by-step explanation:


5 0
3 years ago
What is7/9 as a percentage
Kobotan [32]
I think it is 77%  or  77.7`% ,but tell me if I'm wrong
8 0
3 years ago
Read 2 more answers
Pleaseeeee helpppppp​
natima [27]

Answer:

BCE

Step-by-step explanation:

I hoped this helped and mark me as brainly pls

3 0
3 years ago
Read 2 more answers
Explain answer ! <br><br> Will give brainlst
Ne4ueva [31]

Answer:

x = 4, y = 2

Step-by-step explanation:

Start by multiplying the first equation by 2:

2x + 2y = 12 --> 4x + 4y = 24

Subtract the second from the first:

   4x + 4y = 24

-   5x + 4y = 28

4x - 5x = -x

4y = 4y = 0

24 - 28 = -4

so you end with -x + 0 = -4

Solve for x to get x = 4

Plug x = 4 back into 2x + 2y = 12 to find y.

2(4) + 2y = 12

8 + 2y = 12

2y = 4

y = 2

5 0
3 years ago
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