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mel-nik [20]
4 years ago
12

PLEASE HELP DUE TOMORROW!!!! 20 POINTS!!!!

Mathematics
1 answer:
lions [1.4K]4 years ago
5 0
The first step to seeing if they are equal is simplifying each expression:
1) 4w + 7x - 11y + 3w + 7x + 6y
= 4w + 3w + 7x + 7x - 11y + 6y
= 7w + 14x - 5y

2) 3w + 8y + 8x + 6x -13y + 5w
= 3w + 5w + 8y - 13y + 8x + 6x
= 8w - 5y + 14x

3) 7x - 3y + 12w - 2y - 5w + 7x
= 7x + 7x - 3y - 2y + 12w - 5w
= 14x - 5y + 7w

4) 4w + 4x - y + 3w - 18x - 4y
= 4w + 3w + 4x - 18x - y - 4y
= 7w - 12x - 4y

The first and third are equal to each other.
Hope this helps! :)

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Answer for 23 plz plz plz
den301095 [7]

Answer:

A₍ₙ₎ = - 74 + (n-1) x 6

Step-by-step explanation:

A₍ₙ₎ = A₍₁₎ + (n-1) x d

A₍₁₈₎ = 28 = A₍₁₎ + 17 x d  ..... (1)

A₍₄₀₎ = 160 = A₍₁₎ + 39 x d  .....(2)

(2)-(1)    132 = 22d

d = 6

A₍₁₎ = 28 - 17 x 6 = -74

formula: A₍ₙ₎ = - 74 + (n-1) x 6

3 0
3 years ago
Please help and show steps 0.4÷0.8
Sergio [31]
4 multiplied my 2 is 8

So 0.4 divided by 0.8 is 0.2
3 0
3 years ago
BRAINLIEST <br>if -x = x -6 then x = <br>A. -6<br>B. -3<br>C. 0<br>D. 3<br>explain please​
Paul [167]

Answer:

D or 3

Step-by-step explanation:

The equation you are saying is

-x = x-6

If you move both x's to one side, you get

-2x = -6

From this, you can simplify by dividing by -2

x=3, or D.

Hope this helped!

5 0
4 years ago
Pemfaktoran dari 2x²+5x-18<br><br>​
Harrizon [31]

We can factor a polynomial by finding its roots. In particular, a quadratic equation has (at most) two roots x_1,\ x_2, which would allow us to write the polynomial as

p(x)=a(x-x_1)(x-x_2)

To find the solutions, we can use the quadratic formula

x_{1,2} = \dfrac{-b\pm\sqrt{b^2-4ac}}{2a} = \dfrac{-5\pm\sqrt{169}}{4} = \dfrac{-5\pm13}{4}

So, the two solutions are

\dfrac{-5+13}{4} = 2\quad\text{and}\quad\dfrac{-5-13}{4} =-\dfrac{9}{2}

And so we can factor the polynomial as follows:

2x^2+5x-18=2(x-2)\left(x+\dfrac{9}{2}\right)

3 0
3 years ago
PLs answer correctly will mark brainliest, 40 points
irakobra [83]

Answer:

  • A, C, A

Step-by-step explanation:

<u>Use properties</u>

  • (mᵃ)ᵇ = mᵃᵇ
  • mᵃ*mᵇ = mᵃ⁺ᵇ

10.

  • (-t⁴)³ = -t⁴ˣ³ = -t¹²
  • Option A

11.

  • (t⁸)² = t⁸ˣ² = t¹⁶
  • Option C

12.

  • (x⁻³)⁻⁵x⁶ = x⁽⁻³⁾ˣ⁽⁻⁵⁾x⁶ = x¹⁵x⁶ = x¹⁵⁺⁶ = x²¹
  • Option A
6 0
3 years ago
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