Midpoint formula is M=( (x1+x²)/2 , (y1+y²)/2 )
let A be there point (x1,y1), our (2,3)

plug into the formula to get

(-2,1)=( (2+x²)/2, (3+y2)/2 )
so -2=(2+x2)/2 and 1=(3+y2)/2

x2=-6 and y2=-1
answer is B

7 0

3 years ago

Mana is saving to buy a new bicycle. The equation d = 12w represents the amount in dollars, d, that Mana saves in w weeks.What i

Alchen [17]

Answer:

Constant of proportionality is 12

The cost of buying new bicycle changes 12 dollar per week

Step-by-step explanation:

we are given

The equation as

$d=12w$

where

d represents the amount in dollars

w is number of weeks

now, we can compare it with

$y=kx$

where

k is constant of proportionality

we can compare

and we get

k=12

So,

Constant of proportionality is 12

we can see that

$12=\frac{d}{w}$

So,

The cost of buying new bicycle changes 12 dollar per week

6 0

3 years ago