Consider the point (x, y) lying on the graph of the line 6x + 4y = 7. let l be the distance from the point (x, y) to the origin (0,0). write l as a function of x.
!fast

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?