Mathematics, 11.07.2019 05:00 dbhuggybearow6jng
Ab has a midpoint m at (6, 3). if point a is at (-5, -1) & point b is at (2a - 7, b + 7), find the value of b
Answers: 1
![\bf ~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ A(\stackrel{x_1}{-5}~,~\stackrel{y_1}{-1})\qquad B(\stackrel{x_2}{2a-7}~,~\stackrel{y_2}{b+7}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left( \cfrac{(2a-7)-5}{2}~~,~~\cfrac{(b+7)-1}{2} \right)=\stackrel{\stackrel{midpoint}{M}}{(6,3)}\implies \begin{cases} \cfrac{(2a-7)-5}{2}=6\\[-0.5em] \hrulefill\\ \cfrac{(b+7)-1}{2}=3\\[0.8em] (b+7)-1=6\\ b+6=6\\ \boxed{b=0} \end{cases}](/tpl/images/0075/9089/29807.png)
Another question on Mathematics
Mathematics, 21.06.2019 13:50
Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?
Answers: 1
Mathematics, 21.06.2019 19:00
Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?
Answers: 1
Mathematics, 21.06.2019 21:00
From the beginning of the day the temperature rose 15 degrees so that by 4 pm it was 87 degrees. what was the temperature at the start of the day
Answers: 1
You know the right answer?
Ab has a midpoint m at (6, 3). if point a is at (-5, -1) & point b is at (2a - 7, b + 7), find...
Questions
English, 20.03.2020 06:14
Business, 20.03.2020 06:14
English, 20.03.2020 06:15
Chemistry, 20.03.2020 06:17
Mathematics, 20.03.2020 06:17
Mathematics, 20.03.2020 06:18
