school
Acemy

Linear Functions

SAT Math· difficulty 5/5

Tickets cost \10adult,adult,$6child.200ticketssoldforchild. 200 tickets sold for$1640$. Number of children's tickets:

  • A

    6060

  • B

    8080

  • C

    120120

  • D

    9090

    check_circle

Explanation

10a+6c=164010a + 6c = 1640, a+c=200a + c = 200. From second, a=200−ca = 200 - c; 10(200−c)+6c=1640⇒2000−4c=1640⇒c=9010(200 - c) + 6c = 1640 \Rightarrow 2000 - 4c = 1640 \Rightarrow c = 90.

Want 10 more like this — adaptive to your weak spots?

Practice 10 like thisarrow_forwardPredict my AP score

Related questions

auto_awesomeAll Toolsquestion_answerHomework Q&Amenu_bookAP & SAT PreptimelineLearn Mode