1.) Find the angle between the line with equation and the line with equation r(t)= +t <4,6,7> r(t)= + 2.) Find the point of

 

1.) Find the angle between the line with equation and the line with equation r(t)= +t r(t)= + 2.) Find the point of intersection for the lines v(t)=(1,6,-8)t+(-2,-3,2) and w(u)=(5,9,8)u+(-10,-9,-30) X= y= Z= 3.) Let a(t)=(5,0,-4)t+(9,7,5) and b(u)=(5,0,-3)u+(-9,0,1). Find the acute angle between the lines (in radians) 4.) Let a=(5,3) and b=(2,5). Find -3-a-b.