Question the-eq
The equation represents the number of minutes of daylight (between sunrise and sunset), , and the number of minutes of non-daylight, , on a particular day in Oak Park, Illinois. If this day has minutes of daylight, how many minutes of non-daylight does it have?
The equation x + y = 1,440 represents the number of minutes of daylight (between sunrise
Medium-difficulty · SAT Math · Linear Equations in One Variable — Single-variable equations (multi-step). Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer explanation
Choice B is correct. It’s given that the equation represents the number of minutes of daylight, , and the number of minutes of non-daylight, , on a particular day in Oak Park, Illinois. It’s also given that this day has minutes of daylight. Substituting for in the equation yields . Subtracting from both sides of this equation yields . Therefore, this day has minutes of non-daylight.
Choice A is incorrect. This is the number of minutes of daylight, not non-daylight, on this day.
Choice C is incorrect and may result from conceptual or calculation errors.
Choice D is incorrect. This is the total number of minutes of daylight and non-daylight.
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