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Question 208571: I need help on this problem. I need to know where to put parentheses to make this equation true.
16/4+2*9/3 = 6
It seems the only way to solve is guess and check, but I could not find a solution. Please help me?
Click here to see answer by rfer(16322) |
Question 209380: Theme: 2 Sets of Parenthesis Nested within Each Other
My question: Why does answer, "36" move from (-36) when removed from parenthesis as the last operation of this solution? I need simple but rule based reference of where to study up on how to manipulate parentheses within mathematical/algebraic rules. Thank you.
My solution follows:
(9 + 3 - 4 * ( 8 + ( - 2 ) ^2) )
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Step 1: Find 1st set of inner parenthesis ( - 2 ); No operation indicated;
Step 2: Proceed to next set of inner parenthesis: ( 8 + ( - 2 ) ^ 2 ). Process. 2 ^ 2 = 4;
( 8 + ( 4) ) = ( 12 ). Rewrite equation: ( 9 + 3 - 4 * (12) )
Step 3: All parenthesis and powers are resolved. Now proceed to Multiply, Divide; then Add, Subtract.
So, 4 * 12 = 48; Rewrite: ( 9 + 3 - 48 ). Solve: ( 12 - 48 ) = ( -36 ). Remove parenthesis: A: 36
Click here to see answer by rfer(16322) |
Question 215105: 5x-7(x-6). The answer in the back of the book says -2x+42 but I can't figure out how they arrived at that! Please help!!! I understand the concept of FOIL (First, Outside, Inside, Last) but for some reason I can't seem to get beyond 5x squared. 5x squared - 30x -7x +42, then what? Like terms? Or do I divide by "x"? EEEK!
Click here to see answer by jim_thompson5910(35256) |
Question 215105: 5x-7(x-6). The answer in the back of the book says -2x+42 but I can't figure out how they arrived at that! Please help!!! I understand the concept of FOIL (First, Outside, Inside, Last) but for some reason I can't seem to get beyond 5x squared. 5x squared - 30x -7x +42, then what? Like terms? Or do I divide by "x"? EEEK!
Click here to see answer by stanbon(75887) |
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