What are the slope and y - ir intercept of a line that is perpendicular to line y = 4/5 * x - 3 and passing through point (4, 20) ?

What causes the cyclical changes in the appearance of the moon?

In which area will soil formation be greatest? a a steep slope in a warm,b wet climate a flat area in a warm,c wet climate a north-facing area on a steep slope a flat area in a cold, d wet climate description

Where was oil production at its highest in the 1980s and still remains important to the russian economy? central asia the ural mountains russian siberia the caucasus region