Select two statements that can form a biconditional. If 4v + 10 = 0, then 6w = 3.
If 3w = 6, then 4v + 10 = 0.
If 10v + 4 = 0, then 3w + 6 = 0.
If 6W 3, then 4v 10.
if 3w + 6 = 0, then 10v + 4 = 0.
if 4v = 10, then 3w = 6.
^ answer choices

How do you use the elimination method for this question? explain, because i really want to understand!

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?

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4