Answer:
lady buy 12 trinkets for $0.30 each and 8 trinkets for $0.65 each.
Step-by-step explanation:
Given data:
Total number of trinkets = 20
Cost per trinket may be either $0.30 or $0.65.
Assume total number of trinkets as x when she purchased for $0.30
and y when she purchased for $0.65
Then we have following equation
x + y = 20 --------(1)
Total amount of money spent = $8.80
Then the equation will be
0.30x + 0.65y = 8.80 ---------(2)
from equation we have x = (20 - y), use this in equation 2, we have
0.30(20 - y) + 0.65y = 8.80
6 - 0.30y + 0.65y = 8.80
0.35y + 6 = 8.80
0.35y = 8.80 - 6
0.35y = 2.80
y = 8
we have x value
x = 12
Therefore, lady buy 12 trinkets for $0.30 each and 8 trinkets for $0.65 each.
