X+y=156
<span>0.05x+0.25y=21.6
-1/4*/ x+y=156
1/20x+1/4y=216/10
-1/4x-1/4y=156*-1/4=-39
</span>1/20x+1/4y=216/10
<span>+--------------------------
-4/20x=-17,4
x=87
</span>x+y=156
<span>
87+y=156 y=69
this question answer is </span><span>87 nickels and 69 quarters</span><span>
</span>
Answer:
i think it A
Step-by-step explanation:
Answer:
grater than -6 bars
Step-by-step explanation:
Answer:1/30 page per minute
Step-by-step explanation:
2 1/2 pages =3/2 pages.
3/4 hrs=45 minutes
Hence the number pages he can type per minute =3/2 pages/45 minutes=3/2×1/45=1/30page per minute
V=hpir^2
900=V
r=3
900=hpi3^2
900=hpi9
divide both sides by 9
100=hpi
divide both sides by pi
100/pi=h
aprox pi=3.141592
31.83=h
height=31.83cm
