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Vesna [10]
3 years ago
13

Write and simplify an expression for the perimeter of the triangle or rectangle

Mathematics
1 answer:
patriot [66]3 years ago
5 0
Q21)Answer: 4c - 1
2c + (c - 6) + (c + 5)
= 2c + c - 6 + c + 5
= 4c - 1

Q22) Answer: 15f + 7
(6f - 3) + (5f + 14) + [4(f - 1)]
= 6f - 3 + 5f + 14 + (4f - 4)
= 6f - 3 + 5f + 14 + 4f - 4
= 15f + 7
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Can you please help me thank you so much
77julia77 [94]

Answer:

I would say angle 6 is supplementary to angle 3.

Step-by-step explanation:

Supplementary angles are angles that add up to 180 degrees.

Angles 6 and 3 are right angles.

90 + 90 = 180

Hope I helped!

8 0
3 years ago
Read 2 more answers
A second important result is that electrons will fill the lowest energy states available. This would seem to indicate that every
Assoli18 [71]

Answer:

  • 8

Explanation:

1)<u> Principal quantum number, n = 2</u>

  • n is the principal quantum number and indicates the main energy level.

<u>2) Second quantum number, ℓ</u>

  • The second quantum number, ℓ,  is named, Azimuthal quantum number.

The possible values of ℓ are from 0 to n - 1.

Hence, since n = 2, there are two possible values for ℓ: 0, and 1.

This gives you two shapes for the orbitals: 0 corresponds to "s" orbitals, and 1 corresponds to "p" orbitals.

<u>3) Third quantum number, mℓ</u>

  •    The third quantum number, mℓ, is named magnetic quantum number.

The possible values for mℓ are from - ℓ to + ℓ.

Hence, the poosible values for mℓ when n = 2 are:

  • for ℓ = 0: mℓ = 0
  • for ℓ = 1, mℓ = -1, 0, or +1.

<u>4) Fourth quantum number, ms.</u>

  • This is the spin number and it can be either +1/2  or -1/2.

Therfore the full set of possible states (different quantum number for a given atom) for n = 2 is:

  • (2, 0, 0 +1/2)
  • (2, 0, 0, -1/2)
  • (2, 1, - 1, + 1/2)
  • (2, 1, -1, -1/2)
  • (2, 1, 0, +1/2)
  • (2, 1, 0, -1/2)
  • (2, 1, 1, +1/2)
  • (2, 1, 1, -1/2)

That is a total of <u>8 different possible states</u>, which is the answer for the question.

8 0
3 years ago
What is the distance between -13 and 13 on a number line
Ipatiy [6.2K]

Answer:

26 units

Step-by-step explanation:

Due to:

in the rect line, left to zero = 13 (absolute value)

in the rect line, right to zero = 13 (absolute value)

So the sum of each absolute value is the distance.

Best regards

3 0
4 years ago
Read 2 more answers
What is the equation of the line through the origin and (-5, 6) <br><br>I hate try it's .-.​
vazorg [7]

Answer:

y=-\frac{6}{5} x

Step-by-step explanation:

y=-6/5x+0

y=-6/5x

6 0
3 years ago
Read 2 more answers
Which of the following is the slope of the line<br> A. -3<br> B. 1/3<br> C. -1/3<br> D. 3
Crazy boy [7]

A

Ask if explanation needed :)


6 0
3 years ago
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