Fred earns $ 40 mowing lawns he
spends $10 on mp3, puts half of
whats left in a saving account
and get another $5 for washing
- write the expression represents
the # of dollars fred keeps (and does
not put in saving account).

How to solve a simultaneous equation involved with fractions?

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 (%)

Which of the following is an example of conditional probability