Question 1118486

Libby drive to work 1 hour. If she increases her average speed by 10 miles per hour, the trip takes 3/4 hour. Find the distance she drives to work
<pre>Let distance be D
Then we get the following SPEED equation: {{{matrix(1,3, D/1 + 10, "=", D/(3/4))}}}
{{{matrix(1,3, D + 10, "=", 4D/3)}}}
3D + 30 = 4D
30 = 4D - 3D
Distance, or {{{highlight_green(matrix(1,4, D, "=", 30, miles))}}}
IGNORE all other INCORRECT ANSWERS.