3x+5y=-2
-x+2y=8

solve for this asap!

X = -4  Y =2

Step-by-step explanation:

3X+5Y=-2

-X+2Y=8

I will use elimination.  Multiply the second equation by 3 to eliminate x

3(-X+2Y)=8*3

-3X +6Y = 24

Add this to the first equation

3X+5Y=-2

-3X +6Y = 24

     11Y = 22

Divide by 11

11Y/11 = 22/11

Y =2

Now we need to find X

-X+2Y=8

-X +2(2) = 8

-X +4 = 8

Subtract 4 from each side

-X +4-4 = 8-4

-X = 4

Multiply by -1

X = -4

3x + 5y = -2

-x + 2y = 8

Multiply second equation by 3 and add to the first:

-3x + 6y = 24

11y = 22

y = 2

x = 2y - 8 = -4

Check:

3(-4) + 5(2) = -12 + 10 = -2 good

-(-4) + 2(2) = 8 good

x=-4, y=2

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

addition

step-by-step explanation: