SOLUTION: Find the numerical value of the algebraic expressions: (−3)(a+x), if a=8, x=−10

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Question 1062639: Find the numerical value of the algebraic expressions: (−3)(a+x), if a=8, x=−10
Found 2 solutions by Edwin McCravy, jim_thompson5910:
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!

%28-3%5E%22%22%29%28a%5E%22%22%2Bx%29, if a=8, x=-10

replace "a" by (8), and replace x by (-10)

%28-3%5E%22%22%29%28%288%29%5E%22%22%2B%28-10%29%29

Combine the 8 and the (-10) as -2
[Subtract as in basic math and use the sign
of the larger]


%28-3%5E%22%22%29%28-2%5E%22%22%29

Now multiply the -3 by the -2

%22%22+%2B+6

[A negative times a negative is a positive.]

Or just 

6

Edwin

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

%28-3%29%28a%2Bx%29


%28-3%29%288%2Bx%29 Replace every copy of 'a' with 8


%28-3%29%288%2B%28-10%29%29 Replace every copy of 'x' with -10


Now use PEMDAS to evaluate


%28-3%29%288%2B%28-10%29%29


%28-3%29%288-10%29


%28-3%29%28-2%29


6


So in the end, %28-3%29%28a%2Bx%29=6 when a = 8 and x = -10

The final answer is 6