Question 3 Answer & Explanation - SAT Algebra

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algebra

The ratio of red to blue marbles is 4:5. If there are 36 marbles, how many are blue?

Correct Answer: B

Choice Dhoice A is the correct answer.

Equation: $4x + 5x = 36$
Combine: $9x = 36$
Divide by 9: $x = 4$
Blue: $5(4) = 20$

Choice Dhoice D is incorrect because this is red marbles.

Choice Dhoice C is incorrect because calculation error.

Choice Dhoice B is incorrect because calculation error.

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Linear Functions Set 33

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