Multiple choice

What approximate value should come in place of the question mark (?) in the following equation? (You are not expected to calculate the exact value.) 285.316 + (361.035)1/2 - 43% of ? = 282

  1. 44

  2. 70

  3. 25

  4. 50

  5. 19
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

285.316 + sqrt(361) - 0.43 * x = 282. 285 + 19 - 0.43 * x = 282. 304 - 0.43 * x = 282. 22 = 0.43 * x. x = 22 / 0.43 approx 51.16, which is closest to 50.

AI explanation

Approximate the numbers to get 285 + √361 - 0.43 × ? = 282. The square root of 361 is 19, so the equation becomes 285 + 19 - 0.43 × ? = 282. Solving this gives 304 - 282 = 0.43 × ?, which means 22 = 0.43 × ?, making the missing value approximately 50.

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