If two planes intersect, then they intersect in exactly line(s).

If two planes intersect, then they intersect in exactly one line.

Step-by-step explanation:

When two lines(one-dimensional) intersect , they intersect at a point (no dimension)

When two planes intersect then their intersection is a line which is one -dimensional.

When two planes do not intersect then they are called parallel.

Therefore , if two planes intersect, then they intersect in exactly one line.

the difference between a number and 5 is -2.

step-by-step explanation:

notice that the equation you are given has -2 (negative 2) on the right side, not 2. when you subtract 5 from a number n, you are finding the difference between the number and 5.

the difference between a number and 5 is -2.