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Algebraic Expressions Unit Test

Jacqueline has two part-time jobs. She earns $15 per hour, I , working as a lab assistant, and $12 per hour, s , working as a cashier. This is modeled by 15l + 12s. Evaluate for I = 5 and s = 7 to find how much money Jacqueline will earn at her two jobs this week.

1 answer

To evaluate the expression \(15l + 12s\) for \(l = 5\) and \(s = 7\), we substitute the values of \(l\) and \(s\) into the expression.

  1. Substitute \(l = 5\) and \(s = 7\) into the expression: \[ 15(5) + 12(7) \]

  2. Calculate \(15(5)\): \[ 15 \times 5 = 75 \]

  3. Calculate \(12(7)\): \[ 12 \times 7 = 84 \]

  4. Now, add the two results together: \[ 75 + 84 = 159 \]

Therefore, Jacqueline will earn $159 at her two jobs this week.