Question

how value will be a =2c or another number such as 5c

Theorem 1.3 not given 

Theorem 1.3 not given 

in 4 example  2 [5-2x,< x -30 ] in this equation how 2 is coming in outside 

in 4 example  2 [5-2x,< x -30 ] in this equation how 2 is coming in outside 

Math

find the point in which the joint of (-9,4,5) and (11,0,-1) is met by the prependicular from the origin.

Find the co ordinate of the point which divide the line segment joining the points 4,-3 and 3,5 in the ratio 3:1 internally

question no.  8 plz, solve it

Draw a quardrilateral in cartesian plane,whose vertices are (-4,5), (0,7), (5,-5)and (-4,-2),also find its area.