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cluponka [151]
3 years ago
12

Evaluate 7y - 3y for y=3

Mathematics
2 answers:
disa [49]3 years ago
6 0

Answer:

The correct answer is 12.

Step-by-step explanation:

To solve this problem, we must plug in 3 for each occurrence of y in the expression because we are given that y = 3.  In this case, we will get the following:

7y - 3y

7(3) - 3(3)

To evaluate, we must simplify this expression.  Due to the order of operations, we should compute the multiplication first.  7*3 = 21 and 3*3=9, so we can plug in these values into our expression.

21 - 9

Now, we can perform the subtraction.

21-9=12

Therefore, the correct answer is 12.

Hope this helps!

Komok [63]3 years ago
3 0

7 . 3 - 3 . 3

= 21 - 9

= 12

Just substitute you y = 3 into the equation

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