The probability of getting a white marble from a bag is 1/5. if there are 37 white marbles in the bag, what is the total number of marbles in the bag?

185 marbles.

Step-by-step explanation:

37 × 5 = 185

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.