Answer:
Step-by-step explanation:
A) Let n = the total number of items (pairs of socks and toothbrushes) that have been collected.
After d days, you have collected (4d+5) pairs of socks and (3d+7) toothbrushes. Therefore,
n = (4d+5) + (3d + 7)
n = 4d + 3d + 5 + 7
n = 7d + 12
The expression that represents the total number of items that have been collected is n = 7d + 12
B) After d days, you have collected (4d+5) pairs of socks.
After 7 days, number of pairs of socks collected will be
(4×7 +5) = 33 pairs of socks
After d days, you have collected (3d+7) toothbrushes.
After 7 days, number of toothbrushes collected will be
(3×7 +7)= 21 +7 = 28
Number of pairs of socks - number of pairs toothbrushes = 32-28 = 4
So 4 more pairs of socks than toothbrushes would have been collected on day 7
