10. The coordinates of C and D are 4 and -28 respectively, and F mdpt CD. Solve for:a) m CD _ b) m CF_ c)m FD_ _d) the coordinate of F
Accepted Solution
A:
Answer:a) mCD=7b) mCF=7c) mFD=7d) F(2,-14)Step-by-step explanation:Let the coordinates of C and D be (4,0) and (0,-28) respectively and F is the midpoint of CD
a) mCD Slope formula [tex]m= \frac{y_2-y_1}{x_2-x_1}[/tex]
[tex]m= \frac{-28-0}{0-4}[/tex]
[tex]m= \frac{-28}{-4}[/tex]
[tex]m= 7[/tex]
mCD=7
b) mCF mCF=mCDHence mCF=7
c) mFD
mFD=mCDHence mFD=7
d) Coordinates of F : mid point formula Mid points Formula [tex]x= \frac{x_2+x_1}{2}[/tex]
[tex]x= \frac{0+4}{2}=\frac{0+4}{2}=2[/tex]
[tex]y= \frac{y_2+y_1}{2}=\frac{-28+0}{2}=\frac{-28}{2}=-14[/tex]
coordinates of F are (2,-14)