Why is the western part of lake balkhash composed of fresh water, while the eastern part is composed of salt water pls HELP!

Find the equation of the line passing through the point (–1, 5) and perpendicular to the line 3x + y = 4.

With these question would be nice i needs them in a hurry which nation leads eastern europe in nuclear energy usage? a ukraine b lithuania c slovakia d solvenia which eastern european nation is popular with skiers? a czech republic b estonia c bulgaria d none are

Ocean crust is a. made from submerged continents b. magnetically produced crust c. produced at mid-ocean ridge d. produced at all plate boundaries