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3.02 Problem solving with linear equations

Interactive practice questions

Matches were used to make the pattern attached:


Complete the table:

Number of triangles ($t$t) $1$1 $2$2 $3$3 $5$5 $10$10 $20$20
Number of matches ($m$m) $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$

Write an equation that describes the relationship between the number of matches ($m$m) and the number of triangles ($t$t).


How many matches are required to make $21$21 triangles using this pattern?

Approx 2 minutes
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A diver starts at the surface of the water and starts to descend below the surface at a constant rate. The table shows the depth of the diver over $5$5 minutes.

There are $40$40 litres of water in a rainwater tank. It rains for a period of 24 hours and during this time, the tank fills up at a rate of $10$10 Litres per hour.

Consider the points in the table. The time $($($x$x$)$) is measured in minutes.



Solve problems involving linear equations, including those derived from formulas.

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