6x+y=8
5x+y=8

using elimination method

x=0 y=8

Step-by-step explanation:

So since the y's are already the same you can just subtract, but if one y is a negative and one is a positive you add them to make 0 but you subtract to make them 0 since both are positive,

-11x=0

Isolate the x by dividing -11 on both sides

and it should equal to

x=0

cuz any number divided by a 0 like 0/-11 will be 0

Now put the 0 in one of the equation

5(0)+y=8

then

0+y=8

so

y=8

then I'ma go on Google to make sure my answers are right

Which is right :)

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)