How many different four-letter strings can be formed from the letters a, b, c, d, e (repeats allowed) if the first letter must be a vowel and the last letter must be a consonant?

The diagonals of a quadrilaretral intersect at (-1,4). one of the sides of the quadrilateral is bounded by (2,7) and (-3,5) determine the coordinates of the other side in order for the quadrilaretral to be a square.

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

Which of the following equations is equivalent to x/3-6/x=1