Question of the Day

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3/14 , 5/2

Feb
27
2015
50,280 responses
Question of the Day Statistics
Number Answered
Correct 19,816
Incorrect 30,464
39% correct

Mathematics > Standard Multiple Choice

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

If a, b, and c are numbers such that a over b = 3 and b over c = 7, then (a+b) over (b+c) is equal to which of the following?

Answer Choices

Hint

Apply the following properties of proportions a over b = c over d is equivalent with (a + b) over b = (c + d) over d and a over (a+b) = c over (c+d).

Question of the Day

Can you answer today's question?

Register Next Tests:
3/14 , 5/2

Feb
27
2015
50,280 responses
Question of the Day Statistics
Number Answered
Correct 19,816
Incorrect 30,464
39% correct

Mathematics > Standard Multiple Choice

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

If a, b, and c are numbers such that a over b = 3 and b over c = 7, then (a+b) over (b+c) is equal to which of the following?

Answer Choices

Answer

From a over b = 3 is implied that (a+b) over b = 4 (1)

And from b over c = 7 is implied that b over (b+c) = 7 over 8 (2)

If we multiply (1) and (2) together, we have that (a+b) over (b+c) = 4 times (7 over 8) = 7 over 2 ( b is canceled out).