document.write( "Question 84566: what is the midpoint between (-7,2) and (3,0)? i tried using the midpoint formula, but i still cannot figure out the right answer.
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document.write( "thanks for your help \n" );
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Algebra.Com's Answer #60911 by bucky(2189)![]() ![]() ![]() You can put this solution on YOUR website! Given the two points (-7, 2) and (3,0). Find the midpoint. \n" ); document.write( ". \n" ); document.write( "The x value of the midpoint is halfway between the two x values for the end points. In \n" ); document.write( "other words, the x value of the midpoint is halfway between -7 and +3 on the number line. \n" ); document.write( "You can get this by calculating the distance between -7 and +3. The distance is 10 units \n" ); document.write( "(you can count this out by plotting -7 and +3 on the number line and then counting the \n" ); document.write( "number of units between the two points. You will see that it is 10 units. Half of that \n" ); document.write( "length is 10/2 or 5 units. Therefore the halfway point between -7 and +3 lies either 5 \n" ); document.write( "units to the right of -7 or 5 units to the left of +3. In either case the midpoint \n" ); document.write( "between these values is at -2. Since we were working with the x values, we can now say \n" ); document.write( "that the x value of the midpoint is -2. \n" ); document.write( ". \n" ); document.write( "Another way we could have gotten the x value of the midpoint is to just average the x \n" ); document.write( "values of the two given end points. In other words, average -7 and +3. Do this by adding \n" ); document.write( "them together and dividing them by 2: \n" ); document.write( ". \n" ); document.write( "Averaging ... (-7 + 3)/2 = -4/2 = -2. \n" ); document.write( ". \n" ); document.write( "This agrees with what we found on the number line by counting up 5 from -7 or down 5 from \n" ); document.write( "+3. \n" ); document.write( ". \n" ); document.write( "So we now know that the x value of the midpoint is -2. \n" ); document.write( ". \n" ); document.write( "Next we need to find the y value of the midpoint. The y values of the two given endpoints \n" ); document.write( "are 2 and 0. There are 2 units of difference between them. So halfway between them is \n" ); document.write( "1 unit. This means that the midpoint between them is 1 less than 2 or 1 more than zero. \n" ); document.write( "This means that the y value of the midpoint is +1. \n" ); document.write( ". \n" ); document.write( "We could also have gotten this result by averaging the y values of the 2 endpoints. \n" ); document.write( "In other words, averaging +2 and 0. Add them together and divide by 2: \n" ); document.write( ". \n" ); document.write( "(2 + 0)/2 = 2/2 = 1 \n" ); document.write( ". \n" ); document.write( "That's all there is to it. The x value for the midpoint is -2 and the y value for the \n" ); document.write( "midpoint is +1 so the midpoint is given by (-2, +1) \n" ); document.write( ". \n" ); document.write( "Hope this helps you to see how to get the midpoint for this problem. \n" ); document.write( " |