In a class of 32 students
The mean height of the 14 boys is 1.56 metres
The mean height of all 32 students is 1.515 metres
Workout the mean height of the girls

Піf x = y and y= z, which statement must be true? оа. -x = -2 b. x= z ос. —x = 2 od. 2= x

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.