Set up a system of equations, and use it to balance the chemical equation for the given reaction.C2H2 and O2 react to produce CO2 and H2O.
A. 4C2H2 + 5O2? 6CO2 + 2H2O
B. 2C2H2 + 5O2? 4CO2 + 2H2O
C. 4C2H2 + 3O2? 2CO2 + 6H2O
D. 2C2H2 + 3O2? 4CO2 + 3H2O
Answer: B
Mathematics
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Find 
for the given function.y = 
4
A. 12 
2
B. - 
3
C. 
2 + 
3
D. - 
2 + 
3
Mathematics
Write the complex number in rectangular form.8(cos 30° + i sin 30°)
A. 4
+ 4i
B. 
+ 
i
C. 4 + 4
i
D. 
+ 
i
Mathematics
Write a set representing the description.The multiples of 5 greater than 14 and less than 76
A. {15, 25, ..., 75} B. {15, 20, 25, ..., 75} C. {14, 76} D. {20, 25, ..., 75}
Mathematics
Use multiplication to check the answer. If an answer is incorrect, find the correct answer.
A. Correct B. Incorrect; should be 61 R335 C. Incorrect; should be 60 R336 D. Incorrect; should be 60 R337
Mathematics