Question of the Day

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Mar
29
2015
928 responses
Question of the Day Statistics
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Correct 516
Incorrect 412
55% correct

Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer. 

Machine X, working at a constant rate, can produce x bolts per hour. Machine Y, working at a constant rate, can produce x plus 6 bolts per hour. In terms of x, how many bolts can both machines working together at their respective rates produce in 4 hours?

Answer Choices

Hint

The number of bolts both machines working together at their respective rates can produce in one hour is the sum of the numbers each machine working alone can produce in one hour.

Question of the Day

Can you answer today's question?

Register Next Tests:
5/2 , 6/6

Mar
29
2015
928 responses
Question of the Day Statistics
Number Answered
Correct 516
Incorrect 412
55% correct

Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer. 

Machine X, working at a constant rate, can produce x bolts per hour. Machine Y, working at a constant rate, can produce x plus 6 bolts per hour. In terms of x, how many bolts can both machines working together at their respective rates produce in 4 hours?

Answer Choices

Answer

Machine X, working at a constant rate, can produce x bolts per hour, and machine Y, working at a constant rate, can produce x plus 6 bolts per hour. Therefore, in one hour, both machines working together at their respective rates can produce x plus x plus 6 equals (2 times x) plus 6 bolts. It follows that in 4 hours, both machines working together at their respective rates can produce 4 times ((2 times x) plus 6) equals (8 times x) plus 24 bolts.