Answer:
Length of base (a) = 5 units
Total Surface Area of Pyramid (T.S.A.) = ?
Now,
T.S.A. = Area of four triangles + Area of base
= ≈
-kxy=4x^2-9y^2
-kx=(4x^2/y)-9y
-k=4x/y-9y
k=-4x/y+9y
Answer:
A Variable is a symbol for a number we don't know yet
Its called a constant