Answer: 18
Step-by-step explanation:
6 ÷ 2 = 3
162 ÷ 54 = 3
The constant ratio is 3
6 × 3 = 18
Hope I helped!
A) -2, -1
(solve the second equation for x (subtract 2y to the other side, then divide by 2 so x=-y-3) then plug that equation into the x value of the first equation to get y=-1; plug y=-1 into the second equation to get x=-2)
Answer:
20x?
Step-by-step explanation:
Explanation:
Formula to calculate pH of a chemical or solution is as follows.
pH = ![-log [H^{+}]](https://tex.z-dn.net/?f=-log%20%5BH%5E%7B%2B%7D%5D)
Therefore, calculate the pH of given chemicals as follows.
1). Oven cleaner
pH = ![-log [H^{+}]](https://tex.z-dn.net/?f=-log%20%5BH%5E%7B%2B%7D%5D)
= ![-log [10^{-13}]](https://tex.z-dn.net/?f=-log%20%5B10%5E%7B-13%7D%5D)
= 13
2). Water
pH = ![-log [H^{+}]](https://tex.z-dn.net/?f=-log%20%5BH%5E%7B%2B%7D%5D)
=
= 6.15
3). Blood
pH =
= ![-log [4 \times 10^{-8}]](https://tex.z-dn.net/?f=-log%20%5B4%20%5Ctimes%2010%5E%7B-8%7D%5D)
= 7.40
4). Vinegar
pH =
= ![-log [63 \times 10^{-4}]](https://tex.z-dn.net/?f=-log%20%5B63%20%5Ctimes%2010%5E%7B-4%7D%5D)
= 2.20