Will mark brainliest if its right write an equation to solve the following problem. let e = the total earnings. use a slash ( / ) to show a fraction. maurice and three of his friends have a lemonade stand. they want to make enough money so that, after splitting the earnings evenly, each person earns $12. how much does the lemonade stand need to make?

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.

3.76%

step-by-step explanation: