60

3 -1 5 -6 5 -2 9 4 21 18

r= 1 8 k= 2 1 s= 11 0 4 1 t= 9 3

4 -3

which matrices can be added together?

a) r and s

b) k and t

c) s and t

d) t and r

the answer turned out to be b

(a) solve h+2/6 = h-3/4(b) solve the following simultaneous equations. 2x = y + 66x - 2y = 13x = ? y = ?

What is the value of x? enter your answer in the box. (cm)

Ascatterplot is produced to compare the size of a school building to the number of students at that school who play an instrument. there are 12 data points, each representing a different school. the points are widely dispersed on the scatterplot without a pattern of grouping. which statement could be true