[(25-11)+(15-9)] divided by 5 ;)

Solve the system of equations y= 3/2 - 1, -x+ y =-3

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 (%)

Bring the fraction a/a-4 to a denominator of 16-a^2