The number of students in a classroom is 6 more than 4 times the number of teachers. there are 15 teachers. how many students are there?

the answer is 54 students. You are welcome.

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.

i saw this question before, dont know the asnwer srry

step-by-step explanation: