algebra again....?

1 ⤊

joel drives his car for 20 kmat a certain speed. at a distance, he increases his speed by 5km per hour and drives for an additional 20km. if the total trip taken is one hour, what is his original speed?
(pls.answer with solution)

2007-01-29 20:25:18 · 2 answers · asked by pearl 1 in Science & Mathematics ➔ Mathematics

2 answers

and why exactly are we doing your homework at 3 am?

2007-01-29 20:30:29 · answer #1 · answered by ? 5 · 0⤊ 0⤋

20/x + 20/(x + 5) = 1
Multiply each term by x(x + 5) and factor the resulting quadratic to find x.

2007-01-30 04:38:33 · answer #2 · answered by Helmut 7 · 1⤊ 0⤋