A – If P(n,4) = 20 × P(n,2), determine the value of n.

12. decide whether each statement is always true, sometimes true, or never true. a. when corresponding points of an original figure and its reflection are connected, the resulting segments are all perpendicular to the line of reflection. b. when a point is reflected over a horizontal line, the y-coordinate of the point stays the same. answer both questions and explain

What is the number 321,000,000 in scientific notation? also what is the number? ?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!