Rachel and david share 40 biscuits between them in the ratio 2: 3, how many biscuits do they each get?

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.