Jonathan is 6 years older than twice his sister Margo's age. How old is the age of each person if the sum of their ages is 45?

Step-by-step explanation:

Let m represent Margo's age. Then Jonathan's age is 6+2m, and the sum of their ages is ...

  m + (6+2m) = 45

  3m = 39 . . . . . . . . . subtract 6

  m = 13 . . . . . . . . . . . divide by 3

  45 -13 = 32

Margo's age is 13; Jonathan's age is 32.

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)

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