What number could replace the question mark in the expression below to make it equivalent to 16w4 – 16w2 + 16?
(4x2 – ?)

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

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