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