Carla and Rob left a 20% tip after having lunch at a restaurant. The amount of the tip was $6. Carla's lunch cost $15. Write an equation you can use to find x, the cost of Rob's lunch. a. 0.2x+15=6
b. 0.2(x+15)=6
c. 2(x+15)=6
d. 0.2x=15+6

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?

Which of the following statement about pascal's triangle are true?

Write the rational number in lowest terms 99/-15