Question
Points X and Z are on a number line, and point Y partitions XZ into two parts so that the ratio of the length of XY to the length of YZ is 4 : 5.
The coordinate of X is 3.8, and the coordinate of Y is 7.9.
What is the coordinate of Z?
The coordinate of X is 3.8, and the coordinate of Y is 7.9.
What is the coordinate of Z?
Answers
Reiny
Make your sketch, let Z be x
then :
(x-7.9)/(7.9-3.8) = 5/4
(x-7.9)/4.1 = 5/4
cross-multiply and solve for x
then :
(x-7.9)/(7.9-3.8) = 5/4
(x-7.9)/4.1 = 5/4
cross-multiply and solve for x