Question 8 Answer & Explanation - SAT Algebra

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algebra

Two angles are complementary (sum to 90). One is $x$ and the other is $4x + 10$ . What is $x$ ?

Correct Answer: A

Choice Dhoice C is the correct answer.

Equation: $x + (4x + 10) = 90$
Combine: $5x + 10 = 90$
Subtract 10: $5x = 80$
Divide by 5: $x = 16$
Verify: $16 + 74 = 90$ ✓

Choice Dhoice D is incorrect because calculation error.

Choice Dhoice C is incorrect because calculation error.

Choice Dhoice A is incorrect because calculation error.

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