Question

let c be between d and e. use segment addition postulate to solve for y.dc=3y-30, ce=6y-15, and de=27

Answer 1

`de=dc+ce`

and replace the values from the statements

`\begin{gathered} (27)=(3y-30)+(6y-15) \\ 27=3y-30+6y-15 \\ 27+15+30=3y+6y \\ 72=9y \\ y=(72)/(9) \\ \\ y=8 \end{gathered}`

the value of y is 8