X=-2-8
3x-4y=6
what is the answer for

(x,y) = (-10, -9)

Step-by-step explanation:

(By replacement method ...)

1-  x = -2-8 it's the same thing as x = -10.

2- Replace the given value of x in equation 3x - 4y = 6

Replacing ...

3 * (-10) -4y = 6

3- Then, Multiply 3 by -10;

4) Move -30 to the right side of the equal sign, getting: 6 + 30.

-4y = 36

5) Multiply by -1

-4y * (- 1) = 36 * (- 1) is equal to 4y = -36

6) The four is multiplying the y, so pass the four dividing, getting:

-36/4

The ratio of -36 by 4 equals -9.

Therefore...

x = -10

y = -9

answer is 8x+24

area of vanessa's patio = length × width

given, length = (3x² + 5x + 10)

width = (x² - 3x - 1)

area of vanessa's patio = (3x² + 5x + 10)(x² - 3x - 1)

= 3x²(x² - 3x - 1) + 5x(x² - 3x - 1) + 10(x² - 3x - 1)

= 3x⁴ - 9x³ - 3x² + 5x³ - 15x² - 5x + 10x² - 30x - 10

= 3x⁴ - 4x³ - 8x² - 35x - 10

hence, expression of vanessa's patio = (3x⁴ - 4x³ - 8x² - 35x - 10)