Se encuestó a 120 estudiantes sobre su música preferida. los resultados fueron: 40 prefieren rock, 25 solo electrónica 45 salsa y 8 los 3 tipos de música . además 30 escuchan rock y electrónica , 21 electrónica y salsa y 12 rock y salsa. cuantos escuchan salsa? cuantos escuchan rock? cuantos escuchan por lo menos dos tipos de música? cuántos no escuchan ni rock ni salsa?
cuantos estudiantes no escuchan ninguno de los 3 tipos de música?

144.50

step-by-step explanation:

21.5 x 13.4=288.10 divide by 2

one way is to plot 2 points and connect them which is what the answer choices seem to be doing

it seems to be using the y intercept and the slope

y=mx+b, m=slope, b=y-intercept (where the line hits the y axis)

slope=rise/run

y-intercept is where the line croses the y axis which is the y value where x=0

you seem to have given the wrong slope (you didn't put a number in front of te x, it should be 2/3 or 3/2 looking at the answer options)

y=? x-1

m=? because of your fault

b=-1

so it has a slope of ? and y intercept of -1, meaning it pases through (0,-1)

so draw point (0,-1) (so answer is one of the first 2 option)

if slope is 2/3, then go up 2 and right 3 then draw line through those 2 points

if slope is 3/2, then go up 3 and right 2 then draw line through those 2 points

sometimes it can be so they can fit in with a certain group, and others are just like that because of their personality.