Which of the following would show that the diagonals of quadrilateral DEFG on the coordinate plane are perpendicular?

A. Show that slope of DF¯¯¯¯¯¯ = slope of EG¯¯¯¯¯¯.
B. Show that midpoint of DF¯¯¯¯¯¯ is the same as midpoint of EG¯¯¯¯¯¯.
C. Show that DF = EG.
D. Show that (slope of DF¯¯¯¯¯¯)(slope of EG¯¯¯¯¯¯) = –1.

DF = 5x - 3 = 5(2) - 3 = 10 - 3 = 7 ; DF = 7

EG = x + 5 = 2 + 5 = 7 ; EG = 7

if x = 1, then the answer is 3.5

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.