Step-by-step explanation:
so they use 3×20=60 sheets a day.
in 21 days, they will use 21×60=1260 sheets
Answer:
???
3a) Answer: 84 degrees
3x + 2(x+20)= 180 (total sum of angles in a triangle is 180 degrees)
5x+40 = 180
5x = 140
x= 28
3x= 28 x 3
= 84
hello :
16t²+120 = y
16t² = y -120 so : t² = (y-120)/16
if : y-120 ≥ 0 t = ±√((y-120)/16)
