3. two lines, a and b, are represented by the following equations:

line a: 2x y = 6
line b: x y = 4

which statement is true about the solution to the set of equations?

a. it is (2, 2).

b. there are infinitely many solutions.

c. it is (4, 0).

d. there is no solution.

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)