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aleksandr82 [10.1K]
3 years ago
5

What is 2/5 y + 1/5 x -0.2y-6+(-2)

Mathematics
1 answer:
Sliva [168]3 years ago
6 0

Answer:

\frac{y}{5} + \frac{x}{5}-8

Step-by-step explanation:

1)  Simplify 2 /5y to 2y/5.

\frac{2y}{5} + \frac{1}{5} x-0.2 y-6-2

2) simplify 1/5x to x/5.

\frac{2y}{5} +\frac{x}{5} -0.2y-6-2

3) Collect like terms.

(\frac{2y}{5} -0.2y) + \frac{x}{5} +(-6-2)

4) Simplify.

\frac{y}{5}+ \frac{x}{5} -8

<em><u>Therefor, the answer is </u></em><em><u>y/5 + x/5 -8</u></em>.

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The answer is 3x^4-13x^3-x^2-11x+6.

Solution:

Use algebraic identity: a^m\times a^n=a^{m+n}

For example: x^2\times x=x^{2+1}=x^3

Given expression (x^2-5x+2) and (3x^2+2x+3).

To multiply these equations.

(x^2-5x+2)\times(3x^2+2x+3)

             =x^2(3x^2+2x+3)-5x(3x^2+2x+3)+2(3x^2+2x+3)

             =(3x^4+2x^3+3x^2)+(-15x^3-10x^2-15x)+(6x^2+4x+6)

             =3x^4+2x^3+3x^2-15x^3-10x^2-15x+6x^2+4x+6

Combine like terms together.

             =3x^4+(2x^3-15x^3)+(3x^2-10x^2+6x^2)-15x+4x+6

             =3x^4-13x^3-x^2-11x+6

(x^2-5x+2)\times(3x^2+2x+3)=3x^4-13x^3-x^2-11x+6

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3 0
3 years ago
What is the answer to 5x + 2 = 3x
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Explanation:

5x + 2 = 3x

5x - 3x = -2

2x = -2

x = \dfrac{-2}{2}

x = -1

Hope this helps! ☺

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Answer:

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Step-by-step explanation:

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A little bit harder way: -42 + (-18) or -42 + 18 = -24

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