A system of equations is shown. What is the value of y in the solution to the system?
x - 2y ="5
2x + 4y - 14
A-1
B1
C2
D3

What properties allow transformation to be used as a problem solving tool

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

The suare root of 9x plus 7 plus the square rot of 2x equall to 7