1.find the side of a cube whose surface area is 5400 square. cm?

30 cm

Step-by-step explanation:

Step 1: The surface area of  a cube = 6a^2, where "a" is the side of the cube.

Step 2: We are given surface area of a cube = 5400.

Step 3: Now plug in the surface area of the cube = 5400 and simplify.

5400 = 6a^2

a^2 = 5400/6

a^2 = 900

Now take square root on both sides, we get

a = √900

a= 30 cm

Therefore, the side of the cube is 30 cm.

Thank you.

55

step-by-step explanation:

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)