If a, b,c, d are in proportion, show that √(3a^2+5c^2)/√(3b^2+5d^2) =a/b.

Football player weighed 170 2/3 pounds in may. during the summer he gained 25 5/12 pounds. during the first week of fall practice he lost 10 1/4 pounds and during the second week he lost another 3 1/2 ponds. how much does he weigh at this point? a.182 1/3ib b.181 1/2ib c.182 5/12ib d.183 2/3ib

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0