(-2,-3)
I. (+,+)
II. (-,+)
III. (-,-)
IIII. (+,-)
X can be from -1.6 to -1.7 or x can be from -3.3 to 3.3
A) 8 + 7 + 5 = 20 parts
b) 220 kg ÷ 20 = 11
c) <span> 8 parts crushed gravel: 8 x 11 = 88 kg
7 parts water: 7 x 11 = 77 kg
5 parts cement: 5 x 11 = 55 kg</span>
I would say the answer would be 105
