Evaluating Expressions Practice Question
Question 1
Evaluate the following expression when x= 2 and
y= -3.
Answer
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Step by Step Solution
Step 1
First, substitute x with 2.
Remember to put brackets around 2.
Step 2
Now, multiply 5 with 2. You will get 10.
The expression is now 10 -7y.
The expression is now 10 -7y.
Step 3
Next, substitute y with -3.
Remember to put brackets around -3.
Step 4
Now, multiply -7 with -3. You will get +21.
The expression is now 10 +21.
The expression is now 10 +21.
Step 5
Finally, add 10 with 21. This gives 31.
Therefore, the answer is A.
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