The figure below shows a triangle with an altitude drawn. Determine the values for the variable. Leave answer in simplest radical form. Use A^2 + B^2 = C^2

25*7=175 dollars

(1)   5*7=35,write down 5 and advance the 3
(2)   2*7=14, 14+3(from step one)=17 write down 7 and advance the 1
(3)   since there is no more digits to do calculations, write down the 1
the answer is 175

(is this the mental math you re talking about?)