SAT math Q18 | Mathematics | Page 1

tame zephyrBOT Mar 2, 2024, 4:05 PM

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fleet quest Mar 2, 2024, 4:06 PM

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👍

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What have you tried?

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Seems like you have the answer?

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I see

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Let’s me confirm it rq

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Just in case

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yeah, I’ve double checked it

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There are some mistakes in your process

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If two lines are perpendicular to each others, quotient of their gradient should be -1

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You might have made some mistakes while finding the gradient of s

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The correct answer is B

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Sure

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First, find the gradient of line r, which is (23-3)/(5-d)

Second, it is said that if two lines are perpendicular to each others, the quotient of their gradients is supposed to be -1. Therefore, the gradient of s is -(5-d)/(23-3)

Third, plug in the given points and you’ll find that d-5 will disappear

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np

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!done

tame zephyrBOT Mar 2, 2024, 4:29 PM

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#SAT math Q18