D=12
Because if you write down the equation 4x-8=40 and plug in 12. 4 times 12 is 48
. 48-8 equals 40

The equation of a elipse:

The length of the major axis is equal 2a if a > b or 2b if b > a.
We have

therefore the length of the major axis is equal 2 · 7 = 14.
As x approaches -inf f(x) -> -inf
and as x approaches inf, f(x) approaches +inf
Mark brainliest please
Both lines intersect at the point
(-0.5, 0.5)