Answer:
B. 3
Step-by-step explanation:
If you were to multiply the top equation by 3 then the x value for the first equation would be 6 and since the bottom equation's x value is -6, if you were to add them, they would cancel eachother off.
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Answer: option J: 128 joules
Explanation:
1) From the table you try to find which relation best fits the data.
2) Your best first assumption is that the data may fit a proportional relation.
3) To prove that you find the ratio of Energy ouput to Amount of chemicals.
Doing that you find:
20 32 48 60
----- = ------- = ------ = ------ = 4
5 8 12 15
4) Then you have found a direct relation whose ratio is 4 joules / mol. So, you can apply that constant to the number of moles given:
Energy = 4 joules / mol × 32 mol = 128 joules
Explanation:
Volume of rectangular prism: Length * Width * Height
Solve:
<u></u>
<u>1)</u>
Volume: 9 * 9 * 9 = 9³ = 729 cm³
<u>2)</u>
Volume: 7 * 3 * 2 = 42 m³
<u>3)</u>
Volume: 7 * 7 * 7 = 7³ = 343 cm³
The answer is 12^6-10=12^4
