Forming equations from contextIB MYP Maths Extended: Flashcards

What these 12 flashcards ask

What should you do first with a word problem?
What are the five steps for a word problem?
What does 'twice a number plus 7' look like?
What is a fixed charge?
Plan: SGD 12 plus SGD 0.05 per minute. Formula for C?
What is the perimeter of a rectangle?
What do angles in a triangle add up to?
Which symbol means 'at most'?
Which symbol means 'at least'?
What is the break-even point?
What should you do if an answer is negative but the unknown is a length?
What should you do if the unknown is a number of people and you get 7.5?

Exam questions on Forming equations from context

A mobile phone plan in Singapore costs a fixed charge of 12 Singapore dollars (SGD) per month plus SGD 0.05 for each minute of calls. The monthly bill is $C$ dollars when $m$ minutes of calls are made.
Maria wants her monthly bill to be at most SGD 20. Form and solve an inequality to find the greatest number of minutes of calls she can make.2 marks
A rectangle has length $(2x+3)$ cm and width $(x-1)$ cm. Its perimeter is 46 cm.
Hence find the area of the rectangle.2 marks
A school is hiring a coach for a trip. Company A charges AED 360 plus AED 12 for each student. Company B charges AED 20 for each student and has no fixed charge.
Form and solve an equation to find the number of students, $s$ , for which both companies charge the same amount.3 marks

Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).