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SAT Mathematics QUESTION #5469
Question 1
$2.5b + 5r = 80$ describes the relationship between birds ($b$) and reptiles ($r$) cared for. If the business cares for $16$ reptiles, how many birds can it care for?
  • 5
  • 40
  • 80
Correct Answer Explanation
Substitute $r = 16$: $2.5b + 5(16) = 80 \implies 2.5b + 80 = 80 \implies 2.5b = 0 \implies b = 0$.