If a car is worth $4900when it is 4years old, how old will it be when it is worth $2800

Write the pair of fractions as a pair of fractions with a common denominator

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.