Bethany sells roses and petunias. the expression 3r+2.5p3r+2.5p gives the cost (in dollars) of rr roses and pp petunias. what is the cost of 77 roses and 88 petunias? \$

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

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.