If m∆2 =48º and m∆3 = 76º, determine m∆1

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

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 (%)

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square