Y=-2x-5; -2x+4y=12

i need finding x and y

x=.8 y=6.6

Step-by-step explanation:

To solve this equation, we must solve for 1 variable and insert it in the other equation.

Since the first equation shows that y=-2x-5, we can insert that in place of y in the second equation.

-2x+4(-2x+5)=12.

Now, use the distributive property.

-2x-8x+20=12

Now subtract the variables.

-10x+20=12

Now subtract on both sides.

-10x=-8.

Now we can divide -8 by -10 to isolate x.

x=.8

Now we can substitute what we got for x in place of the equation that is equal to y.

y=-2(.8)-5

y=-1.6-5

y=-6.6

Hope this helps!

the answer would be a 24

step-by-step explanation:

c=2πr=2·π·3=24