Triangle TUV is dilated by a scale factor of 5 to form triangle T'U'V'. Side VT measures 13. What is the measure of side V'T'?

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 (%)

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

X+y=-4 x-y=2 use elimination with adding and subtraction