Dave has $11 to spend on a $6 book and two birthday cards (c) for his friends. how much can he spend on each card if he buys the same card for each friend?

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0