How many linear orders are there on a deck of cards with 2 red, 4 blue, 10 white, and 5 green cards, which do not start and end with the same card? Two orders are considered the same if they have the same color pattern

4 packs of water and 7 packs of candy bars

step-by-step explanation:

35x4=140

140/20=7

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1

y=-2.5x+12.5

step-by-step explanation:

5y=2x+10

y=0.4x+2

slope=-2.5

5=-2.5*3+b

b=12.5

it is given that, b ≅ bc and ad ≅ cd  

we need bd perpendicular to ac, then only we can say   triangles axb and cxb are congruent using the hl theorem.

if bd perpendicular to ac, means that ab and cb are the hypotenuse of triangles axb and cxb respectively.

from the given information abcd is a square

if bd and ac bisect each other then ax = cx

then only we can   immediately possible to prove that triangles axd and cxd are congruent by sss congruence theorem.