18-[-(-3+2)+2]
2x+3y=20
3x+2y=30
Question 1
Lead-209 is a radioactive isotope. It has a half-life of 3.3 hours. Suppose that 40 milligrams of
this isotope is cre...
8x + 5y + 7x + 6y
6x + 2y + 2x + 3y
3*10^8 divided by 1.44
7x + 6y - 2x + 3y
{ A = int to { 300 } from { 0 } { [ { − 6 { x ^ 2 + "18x" } left ( { u over 100 } right ) − 2 x ^ 2 − "6x" left ( { u over 100 } r...
(x -3) : 2 + 7 = 19
