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12-x -4 - What would the answer to this be? - Wyzant Hello, Matthew, 12-x -4 As written, this looks like 12 minus the quantity (x -4) I suspect you actually mean (12-x) -4 The last expression says take (12-x) and divide by -4 It is quite different If the first expression is written the way you meant it, the only thing I can see to do would be to simplify the (-x -4) term to simply +x 4 or - 0 25x If the second form is what you want: This can
Y varies inversely as x. Y=12 when x=7. Find y when x=4 - Wyzant If y varies inversely with x, that means that y follows the form: y = a x Now, given that y = 12 when x = 7 we just need to plug 12 in for y and 7 in for x into the equation y = a x and solve for a
If 3x-y=12, what is the value of (8^x 2^y)? - Wyzant Next, simplify using the power of a power property where (x n) m = x n*m so we get (2 3) x = 2 3x Altogether we now have (23x 2y) Using the quotient of powers property, which states that (x n x m) = x n-m, we can rewrite the second equation as 23x-y We were given in the prompt that 3x-y = 12 so the final answer is A) 212
1 2x=12 ??? | Wyzant Ask An Expert 1 2 = X 4 W e use cross Multiplication to get rid of the fractions: 1 2 = X 4 , 2X = 4 X = 4 2 Note that cross Multiplication is nothing more that Multiplying both sides of an equation by the same numbers Here another example ( X -3 ) 4 =X 5 5 ( X - 3 ) = 4X Result of cross multiplication