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FromTheMoon [43]
2 years ago
5

If C=x^{2}+7C=x 2 +7 and D=3x^{2}-4x+3,D=3x 2 −4x+3, find an expression that equals 3C+3D3C+3D in standard form.

Mathematics
1 answer:
11111nata11111 [884]2 years ago
4 0

Answer:

3C + 3D = 12x² -12x + 30

Step-by-step explanation:

Given

  • C = x² + 7
  • D = 3x² - 4x + 3

To determine

  • 3C + 3D

The expression is given by

3C + 3D

substituting C = x² + 7 and D = 3x² - 4x + 3

= 3(x² + 7) + 3(3x² - 4x + 3)

= 3x² + 21 + 9x² - 12x + 9

= 12x² -12x + 30

Thus, the expression in standard form is:

3C + 3D = 12x² -12x + 30

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A pendulum is constructed by attaching a 4m rope to a bowling ball. It is then displaced 2m to one side and released.
Arada [10]

Answer:

T = 4.0 s

Step-by-step explanation:

The period of a simple pendulum is given by

period = 2\pi \sqrt{ \frac{l}{g} }

where l = length of the pendulum

= 4 m

g = acceleration due to gravity

= 9.8 m/s^2

period = 2\pi \sqrt{ \frac{(4 \: m)}{(9.8 \:  \frac{m}{ {s}^{2} } )} }  = 4.0 \: s

8 0
3 years ago
The sum of the measures of the interior angles of a triangle is 180°. The sum of the measures of the interior angles of a quadr
omeli [17]

Answer: 1080 degrees

Step-by-step explanation:

Since the general formular is

(n - 2 )180 = interior angle.

Where n is the number of sides the polygon has.

Octagon has 8 sides so therefore n= 8.

(8-2 ) * 180

= 6 * 180

=1080.

The total number of the interior angles measured is 1080 degrees.

6 0
3 years ago
D
kirza4 [7]

Answer:

12+k/5

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8 0
3 years ago
Janelys buys milk and apples at the store.
Natali5045456 [20]

Answer:

Each bag costs $4.75

Step-by-step explanation:

41.22 = 3.22 + 8x

38 = 8x

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7 0
2 years ago
Answer pwease lol now
Anettt [7]

Answer:

D) y = 27 · (3)^x

Step-by-step explanation:

Replace x with the x values.

27 · (3)^-2 = 27 · 1/9 = 3

27 · (3)^-1 = 27 · 1/3 = 9

27 · (3)^0 = 27 · 1 = 27

27 · (3)^1 = 27 · 3 = 81

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D is your answer.

Hope this helps

5 0
1 year ago
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