Solve for n. 1/ n-4 - 2/n = 3/ 4 - n

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 (%)

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = x^2 + 7x + 10