Answer: He actually rode 2 miles per hour on his trip
Step-by-step explanation: Maybe unconventional, but express the time it took, then figure the speed.
Time = distance /speed t will represent time, s is the speed: t = 30/s Use the rime it would have taken at the higher speed to create an equation:
t-12 = 30/s+8 replace the y with the 30/s
30/s -12 = 30/s+8
(s)(30/s -12 ) = (s)(30/s+8 ) Cross multiply to cancel denominators
(s-8)(30 -12s) = (s-8)(30s/s+8 ) ==> 30s +240 -12s² -96s =30s Simplify:
(-1)(-12s² -96s +240 ) =0 ==> 12s² +96s -240 divide all by 12
s² + 8s -20 = 0 Factor and solve for s
(s +10)(s -2) =0 s-2=0 S= 2
Proof:
30/2 = 15 hours for original trip at 2mph,
increase speed by 8mph 2 + 8 = 10mph
30 miles at 10mph takes 3 hours; that is 12 hours less than his actual trip.
(Brainilest, please :-)
Hi Brielle the correct answer to your question is 3.12 x 4.0 = 12.48
Answer:
sorry that hard a only in 5th grade
A poet and a poem I think, but he also compares her to a garden and a flower.
The height of parallelogram JKLM is 6.25 square feet. This is because the formula for the area of a parallelogram is base x height. So, since we have the base (14 feet), you simply divide the area (87.5 square feet) by the base, and get the final height (6.25 square feet. HOPE THIS HELPS!!!
