Two points A and B, are plotted on a centimeter grid. A has cordinates (2,1) and B has cordinates (8,5). a. work out the cordinates of the mis point of the line joining A and B.
b. use Pythagoras Theorem to work out the length of AB. Give your answers to correct 3 significant figures.

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits