Angeline bought a yards of satin fabric priced at 8.09 per yard, and c yards of cotton fabric priced at 3.79 per yard. Use an expression to determine amount that Angeline would spend in all she bought 5 yards of satin fabric and 8 years of cotton fabric.

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.