Find the distance cd rounded to the nearest tenth? c=(7-4) d=-(-8-5)

Can someone answer this question? : )

What is the value of x in the following equation? -3x-2=2x+8

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 (%)