Question

Evaluate the expression 7x2y, when x = 3 and y = 4. ^ The 2 is too the power of whatever x is.

Answer 1

$7x^2y \hbox{ when } x=3 \hbox{ and } y=4 \\ \Downarrow \\ 7 \times 3^2 \times 4=7 \times 9 \times 4=\boxed{252}$

Answer 2

Answer:

The answer would be 252. I know this because I got it correct on my study guide.

Step-by-step explanation:

First I write down the problem like this...      7 (3) ² 4.

Since the # is in parenthesis I multiply 3 by the power of ² which equals to nine. (Remember, when I am multiplying 3 to the power of ² I do not multiply 3 times 2. I multiply 3 by itself 2 times. 3 x 3 = 9. I think you get the point.)

Now, you write it like this.... 7 x 9 x 4. All you have to do know is multiply. You can start anyway you like. If I multiply 9 x 4 first that equals 36. 36 x 7 gives me 252.

The same thing is the other way around. If I multiply 7 x 9 that equals 63. 63 x 4 also equals 252!

I hope this helped you. Please mark as Brainliest and let me know if I could help you with future questions. Have a Great Day Everyone!