1. 48 ? -8 = -6
48<em>/</em> -8 = -6
2. -40 ? 8 = -5
-40<em>/</em> 8 = -5
3. 12 ? -2 = 14
12 <em>-</em> (-2) = 14
12 + 2 = 14
4. 18 ? -12 = 6
18 <em>+</em> (-12) = 6
18 - 12 = 6
5. 18 ? -20 = -2
18 <em>+</em> (-20) = -2
18 - 20 = -2
6. 22 ? -0.5 = -11
22 <em>*</em> -0.5 = -11
22 / -2 = -11
You just have to check your work :)
Answer:
He has 3 $20 and 3 $5
Step-by-step explanation:
20 x 3 = $60
5 x 3 = $15
15 + 60 = $75
Answer: 0.067 litres of water
Step-by-step explanation:
The mode is:
Concentration of new solution = Moles of acid in original solution / (Volume of original solution + Volume of water added)
Assume volume of water added is w.
12 = 16 (0.2) / (0.2 + w)
(0.2 + w) * 12 = 3.2
0.2 + w = 3.2 / 12
w = (3.2 / 12) - 0.2
w = 0.067 litres of water
