HELP PLEASE! Step by step

337.5 cm squared

Step-by-step explanation:

We are given the formula for the surface area of a cube: , where "a" is the length of each edge.

The problem says that the length of each edge is 7.5, so this is the value for "a" that we want to use. Substituting 7.5 in for "a", we have:

Thus, the total surface area is just 337.5 cm squared.

Hope this helps!

an

y = 6x -3y -12

y +3y +12 = 6x

=> . x = { 2y / 3 +2 } this is equation of line in terms of x

=> . if line meets the x-axis the co-ordinates of meeting point would be ( x , 0 )

=> . x = 2 ( 0 ) / 3 + 2

=> . x = 2

so, the point is ( 2 , 0 )

mrbilldoesmath!

answer: a parabola

steps:

(x-1)(x+4)   = x(x+4) - 1(x+4) = (x^2 + 4x) - (x+4)

                = x^2 +4x -x -4   = x^2 +3x -4

which is a parabola

mrb