The line AB has midpoint (2, 5).
A has coordinates (1, 7).
Find the coordinates of B.

(3,3)

Step-by-step explanation:

To find the midpoint add the x coordinates together and divide by 2

(1+ xb)/2 = 2

1+ xb = 4

xb = 4-1

xb =3

To find the midpoint add the y coordinates together and divide by 2

(7+ yb)/2 = 5

7+ yb = 10

yb = 10-7

yb =3

too many. (jk)

31 v bucks

step-by-step explanation:

since you bought 25 on friday and 6 on tuesday, you can just add them up.

25+6=31

check your work.

31-6=25

i hope this !

-yand3r3

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81