The equation 8w+4= 76 models how many weeks, w, it takes a
student to save for a new video game. if the student saves the same
amount of money each week, how many weeks does it take the
student to save for the new video game?

9

Step-by-step explanation:

Change +4 to -4 then subtract 4 from 4 then subtract 4 from 76. 8w=72÷ them both by 8 and you get W=9

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)