First you need to subtract 35 to get one equation =0.
x^2-10x-10=0 then use the quadratic formula (let me know if you need the formula of need to see these steps)
and solve to = approximately 8.87 and 1.12
(1 + v)(v - 7)
1*(v - 7) + v(v - 7)
1*v - 1*7 + v*v - v*7
v - 7 + v² - 7v
v² - 7v + v - 7
v² - 6v - 7
I hope this helps.
Answer: 3.4 is 80% of 4.25
I assume O is where the three medians meet.
because triangle ABC is equilateral, the median is also the angle bisector and the altitude.
BO is 2/3 of BE, BE=CF=AD=20, so BO=40/3
