Answer:
Step-by-step explanation:
72,80,178 , hope this helped
2x-y=8
x+y=20
------------
3x=28
×=28÷3=9.3
so
9.3+y=20
y=20-9.3
y=20.7
16
1/4 pie=4
2/4 pie= 8
3/4 pie= 12
4/4pie= 16
D. a line graph