Trey drove 200 miles using 9 gallons of gas. At this rate how many gallons of gas would he need to drive 420 miles

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]

Parallelogram efgh is a rectangle. he = 6, and fe = 8. find ge: and find fj:

Find the measure of angle b in the following triangle