Solve the following system of equations for all three variables. 7x + 9y – 2z = 9

X – 9y – z = -3

- 8x – 9y + 5z = 6

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

Graph the equationy= x+3[tex]y = x + 3[/tex]

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.