AnswersGA-8th Grade Mathematics-B CCSS 23-24 GLProblem Solving with SystemsQuestion 20
20
AssignmentMultiple Choice

Problem Solving with Systems

Question 20 • GA-8th Grade Mathematics-B CCSS 23-24 GL

Aeva is selling friendship pins as a service project. Each pin with green beads sells for $3. Each pin with red beads sells for $2. She raised $312. The number of pins with green beads is 11 fewer than the number of pins with red beads. How many red pins did Aeva sell?

Answer
A
47
B
47
C
58
D
58
E
69
F
69
G
80
H
80

Explanation

Let r be the number of red pins. Then Aeva sold r − 11 green pins. The total revenue gives 2r + 3(r − 11) = 312, so 5r − 33 = 312 and r = 69. She sold 69 red pins, shown as choice E.

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