Each marble bag sold by ann's marble company contains 7 blue marbles for every 4 yellow marbles. if a bag has 24 yellow marbles, how many blue marbles does it contain?

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

answer: 298143

step-by-step explanation: