which of the following are ordered pairs for the equation y = -4x + 5? (0,5) (1,1) (-1,9)(0,5) (-1,-1) (-1,-9)(0,5) (1,-1) (-1,9)(0,5) (-1,1) (-1,-9)

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?