There are 100 coins scattered in a dark room. 90 have heads facing up and 10 are facing tails up. you cannot tell which coins are which. how do you sort the coins into two piles that contain the same number of tails up coins?

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212

A25- foot ladder leans against a building and reaches a point of 23.5 feet above the ground .find the angle that the ladder makes with the building