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mariarad [96]
3 years ago
13

6. Find the coordinates of A if M-1, 2) is the midpoint of AB and B has coordinates of (3.-5).

Mathematics
1 answer:
AlekseyPX3 years ago
4 0

Answer:

A(-5,9)

Step-by-step explanation:

Let A(a,b)

Since M is the midpoint then of A(a,b) and B(3,-5) then

M( (a+3)/2 , (b-5)/2)

But it is given that M(-1,2)

So (a+3)/2 = -1 which implies a=-5

and (b-5)/2=2 which implies b=9.

Therefore A(-5,9)

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What is the y-intercept of the line thaf passes through the points (3, 7) and (-2, -3)
Lunna [17]
So to answer this question you first need to find the point slope form and then convert that to slope intercept form.

Point slope form is y-y1 = m(x-x2) where m is slope and (x2,y2) is a point on the line.
Slope is equal to (y2-y1)/(x2-x1). Since you are given two points you simply plug them in!

(7 - - 3)/(3 - - 2) Cancel the double negatives
(7+3)/(3+2) Add what's in parentheses
10/5 Divide
m = 2

Now you can choose either given point to use in your point slope formula. I will be using (3,7) because I wont have to worry about canceling out the negatives.

y - 7 = 2(x - 3)

Now you simply distribute and isolate y to get slope intercept form.

y-7 = 2(x-3) Distribute the 2

y - 7 = 2x - 6 Add 7 to both sides

y = 2x + 1

Since y = mx+b and b is the y intercept. You that you y value when x is zero is 1. This means your final coordinate will be (0,1) or C.
5 0
3 years ago
Find AB if (-9,2) and B(5,-4)​
AVprozaik [17]

Answer 1,-8

Step-by-step explanation:

9+x=10

x=1

2+y=-6

y=-8

B= 1,-8

6 0
3 years ago
-3(5x-9) solve!!!!!!
arsen [322]

Answer:

-15x+27

Step-by-step explanation:

-3 * 5x = -15x

-3 * -9 = 27

4 0
3 years ago
(10+ 2)12-06)<br> What is the answer?
Nutka1998 [239]
10+2=12-06/6=6
Hope this helped you ^^
8 0
3 years ago
Please help!
vichka [17]

Answer: 25%

Step-by-step explanation:

You have a 1/2 chance of landing a heads or tails both times. So, you multiply 1/2 *1/2 = 1/4. 1/4 = 0.25 = 25%.

5 0
3 years ago
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