If cos= 1/2, then what are two possible lengths of the opposite side?

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

1. solve the system of equations by graphing: y = -3x - 3 m = b = y = 2x + 2 m = b = plz solve now

Whoever gets this right gets the ! the half life of a soul smelling substance is 4 years. if you have 8 oz of this strange substance, how much of it will you have after 20 years? show work.