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Chapter 8: Q30. (page 406)

Evaluate the expression when x=-5 and y=-7.

3x-4y

Short Answer

Expert verified

Thevalue of given expression would be 13.

Step by step solution

01

Step 1. Given Information.

An expression: 3x-4y

02

Step 2. Calculation.

To find the value of the given expression, we will substitute x=-5and y=-7 in our given expression as shown below:

3x鈭�4y=3鈭�5鈭�4鈭�7Substitutinggivenvalues=鈭�15鈭�4鈭�7Usingproperty鈭�+=鈭�=鈭�15+28Usingproperty鈭�鈭�=+=13

03

Step 3. Conclusion.

The value of given expression would be 13.

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