7. david bought two types of cards. he bought x type of cards that cost $4 andy
type of cards that cost $2. there are a total of 22 cards and they have a total cost of
$26. if he bought 5 of the $4 type of cards, how many of the $2 cards did he buy?
cards

Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.