Which statement describes the system of equation?
{-5x - 4y = -4
{25x + 20y = 20
a. it has one solution (4, -4).
b. it has one solution (8, -9).
c. the system has no solution.
d. the system has infinitely solutions.

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Ben and cam are scuba diving. ben is 15.815.8 meters below the surface of the water. cam is 4.24.2 meters above ben. what is cam's position relative to the surface of the water? choose 1 choose 1 (choice a) a 11.611.6 meters above the surface of the water (choice b) b 11.611.6 meters below the surface of the water (choice c) c 2020 meters above the surface of the water (choice d) d 20 meters below the surface of the water

You make a necklace using blue, purple, and green beads in a ration of 1: 1: 2. you use the total of 168 beads. how many green beads in the necklace?