left his credit card in the kitchen. He turned around and headed back to the house, driving 20mph (more traffic returning) If it took him a total of 0.6 hours to leave and then return home, how far had Yang driven before he turned around?
2007-02-08 04:19:39 · 5 answers · asked by kp 2 in Politics & Government ➔ Law & Ethics
as you said-"a short while."
2007-02-08 04:25:49 · answer #1 · answered by slabsidebass 5 · 0⤊ 0⤋
The distance is the same: 'L'
30mi/hr * Xhrs. = L
20mi/hr * Yhrs. = L
30x = 20y and
x+y = 0.6hrs.
2 equations, 2 unknowns: x = 2/3y substitute in the 2nd equation yields:
x = 0.24hrs.
y = 0.36 hrs.
0.24hrs * 30mi/hr = 7.2 miles
0.36hrs * 20mi/hr = 7.2 miles
.
2007-02-08 04:38:35 · answer #2 · answered by Bayou Brigadier 3 · 0⤊ 0⤋
I think you need the homework/math group for this question!
2007-02-08 04:23:54 · answer #3 · answered by Anonymous · 0⤊ 0⤋
7.5 miles and Hillary the hag suks!!!
2007-02-08 04:27:48 · answer #4 · answered by Anonymous · 0⤊ 0⤋
7.1 miles
2007-02-08 04:31:43 · answer #5 · answered by xox_bass_player_xox 6 · 0⤊ 0⤋