Hey what's the answer ?

(~‾▿‾)~​

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 value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

Which expression gives the exact value of x?