Evaluating Expressions Practice Question

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Question 2

Evaluate the following expression when x= -3 and y= 2.

Algebra expression 5x^2y

Answer

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Select and check your answer...

A. 60
B. -60
C. -90
D. 90

Step by Step Solution

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    Step 1

    First, substitute x with -3. Remember to put brackets around -3.

    Substitute x with -3
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    Step 2

    Now, (-3)2 is equals to (-3)(-3). Multiplying -3 with -3 gives 9.

    (-3)^2 is equals to 9
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    Step 3

    Next, multiply 5 with 9. You will get 45.

    The expression is now 45y.

    Multiply 5 with 9. This gives 45.
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    Step 4

    Next, substitute y with 2.

    Substitute y with 2
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    Step 5

    Finally, multiply 45 with 2. You will get 90. Therefore, the answer is D.

    Multiply 45 with 2. This gives 90.