Question

The value of 2x + 2y, for x = 7 and y = 3, is 50. True False

Answer 1

2x+2y =50
2(7)+ 2(3)=50
14+6 =50
20=/=50

This is false because when you substitute the variables with their numbers and then multiply and add, your answer does not equal 50

Answer 2

Well we just have to plug in x for 7 and y for 3 
given our equation..
2x + 2y = 50
when x = 7 
and y = 3 

2(7) + 2(3) = 50 

Now we know that 2 x 7 = 14 
and that 2 x 3 = 6 
Now plug those in 

14 + 6 = 50
now 14 + 6 = 20 
20 = 50? 
NOPE 20 does not equal 50 

So your answer is FALSE. 

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