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Vlada [557]
3 years ago
13

The midpoint of AB is M(1, -4). If the coordinates of A are (-3,-6), what are the coordinates of B?

Mathematics
1 answer:
kramer3 years ago
6 0

Answer:

The coordinates of B is (5,-2)

Step-by-step explanation:

In order to find the coordinates of B, you have to use midpoint formula. Then substitute the following values into the formula :

m = ( \frac{x1 + x2}{2} , \frac{y1 + y2}{2} )

Let (x1,y1) be A (-3,-6),

Let (x2,y2) be B,

Let midpoint be M (1,-4),

(1, - 4) =  (\frac{ - 3 + x2}{2} , \frac{ - 6 + y2}{2} )

by \: comparison, \:

\frac{ - 3 + x2}{2}  = 1

- 3 + x2 = 2

x2 = 5

\frac{ - 6 + y2}{2}  =  - 4

- 6 + y2 =  - 8

y2 =  - 2

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Find two numbers whose sum is 9 and whose difference is -1
faltersainse [42]

Answer:

4 and 5

Step-by-step explanation:

Make a system of equations:

x+y=9

x-y=-1

x=9-y

9-y-y=-1

9-2y=-1

-2y=-10

y=5

Since y=5, x must be 4 since 4+5=9 and 4-5=-1

Hope this helped!

4 0
3 years ago
Read 2 more answers
Maurice's new CD has 12 songs. Each song lasts between 3 and 4 minutes. He estimates that the whole CD is about 30 minutes long.
nlexa [21]

Answer:

The estimate is less than the actual length of the CD.

Step-by-step explanation:

Consider the provided information.

Maurice's new CD has 12 songs. Each song lasts between 3 and 4 minutes.

That means the minimum length of the CD should be: 12×3=36 minutes.

The maximum length of the CD should be: 12×4=48 minutes

He estimates that the whole CD is about 30 minutes long.

30 minutes is less than 36 minutes.

That means, the estimate is less than the actual length of the CD.

Hence, the correct statement is: The estimate is less than the actual length of the CD.

6 0
3 years ago
Which of the following is a non terminating decimal ( )<br><br>a)¾ b) ⅘ c)⅓ d) none ​
balandron [24]

C is a non terminating decimal.

a = 0.75

b = 0.8

c = 0.333333 (and will never terminate)

6 0
3 years ago
Find the average of 27 and 45
Romashka [77]
Average is the total of the numbers divided by the amount of numbers.
\frac{27+45}{2}
\frac{72}{2}
36 is the answer.
3 0
3 years ago
Read 2 more answers
Bill has enough money to buy less then 1/2 pound of cheese.how much cheese could bill buy
frez [133]
1/4 
because 1/2 = 2/4 and 1/4 is smaller :)

1/2 (2/4):
o o o o

1/4: 
o o o o

see, less! :)
so the answer is 1/4

3 0
3 years ago
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