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What is it called when you find the numerical value of an expression?
You cannot find the answer to an expression!!! An expression needs to be EQUATED' to a value, for another value to be found. 2x^(2) + 5x + 12 is an EXPRESSION. Impossible to find an value for 'x'. However, 2x^(2) + 5x + 12 = 0 is an EQUATION and a result can be calculated.
What is the value of the expression 5X-2y when x equals 9 and y equals 4?
5X - 2Y X = 9 Y = 4 5(9) - 2(4) 45 - 8 37 is the value
5x plus 3 equals -12?
5x + 3 = -12 5x =-12-3 =-15 x = -3
What is the value of t when 5x equals -2 and 4y equals -4?
It is impossible to give the value of t when it is not defined.
What is the sum of this equation -5x plus y equals -12 -3x plus 6y equals -12?
-5x + y = -12- 3x + 6y = -12Since both of expressions have a value of -12, their sum is - 24. This is true only whenx = 20/9 and y = -8/9.-5x + y = -12y = 5x - 12- 3x + 6y = -12-3x + 6(5x - 12) = -12-3x + 30x - 72 = -1227x = 60x = 60/27x = 20/9y = 5x - 12y = 5(20/9) - 12y = 100/9 - 12y = (100 - 108)/9y = -8/9
