A pack of 40 card (ace , 2 ,3 ,4 ,…..10) divided into 4 colors. What is the number of Minimum attempts of choosing cards to give us at least 3 cards with the same numbers?

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?

Yolanda wanted to buy a total of 6 pounds of mixed nuts and dried fruit for a party she paid 21.60 for mixed nuts and 11.90 for dried fruit did yolanda but enough mixed nuts and dried fruit for the party