A gold bar has a trapezium cross sectional area. Gold has a density of 19.3 grams cm³.
Work out the mass of the gold bar.
Give your answer in kilograms.

What is the value of x when x + 7 = 21?

What is the slope of the line that contains the points (-2,1) and (0,-3)

Abag contains 10 white golf balls and 6 striped golf balls. a golfer wants to add 112 golf balls to the bag. he wants the ratio of white to striped gold balls to remain the same. how many of each should he add?