SOLUTION: I am struggling with these two problems: a) Which of the following is not an expression? 4r = 5; 15r + 18; 24r - 12; 18r divided by 9 b) Evaluate the expression if x=3 and

Question 119176: I am struggling with these two problems:
a) Which of the following is not an expression? 4r = 5; 15r + 18; 24r - 12; 18r divided by 9

b) Evaluate the expression if x=3 and y = -1
6x (exponent 2) + 22xy + 20y(exponent 2)

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
a)
Anything with an equal sign is an equation which is not an expression. So is not an expression

b)

Start with the given expression

Plug in and

Square 3 to get 9

Square -1 to get 1

Multiply

Combine like terms

So when and
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