What is the value of 7.5(3x + 4), when x = 7?

When it says "when x = 7" this instantly means you should evaluate. 
You are going to plug in the number "7", which means the variable "x" is going to become "7":


So, now what you're going to do is MULTIPLY 3 and 7:
(Note: Remember PEMDAS, work in the Parenthesis first)

So, now your problem should look like this:

Next step is to add 21 and 4, (We are still working in Parenthesis):

Final step, you are going to Multiply 7.5 and 25 to get your answer, like this:

Your correct answer is:


Good luck with your studies, I hope this helps~!

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