volume_mute

What is the numerical value of the following expression?

publish date: 2022/08/20 21:56:00 GMT+10

volume_mute

Given x = 3 and y = 4

|5xy -7| 

67
-67
68
-68

Correct Answer

67

Explanation

  1. Substitute 3 for x and -4 for y. 
    • |5xy -7| = |5(3)(-4) -7|
  2. Do the multiplication: 5(3)(-4) = -60.
    • |-60 -7|
  3. Do the subtraction: -60 -7 = -60 + (-7) = -67.
    • |-67|
  4. Find the absolute value of -67 which is
    • 67

Reference

Mathematics for college students

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