Davis has ten apples. gus is hungry and eats a fifth of them, but davis buys twice the amount gus ate the next day. how many apples is davis left with after the purchase? :

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Find the area of an equilateral triangle with a side of 6 inches

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line