Practice Quiz

SAT Math

Category - Algebra and Functions

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Olivia bought 4 kg of apples for $5.20. What is the cost of 3 kg of apples?
  1. $3.80
  2. $3.90
  3. $4.00
  4. $4.10
  5. $4.20
Explanation
Answer: B - The cost of 3 kg of apples is $3.90. Money and apples vary directly.
x:5.20 = 3:4
4x = 3 × 5.20
x = (3 × 5.20)/4 = 3 × 1.30 = 3.90
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