Heather, David, and Kevin have a total of $90 in their wallets. David has $6 less than Heather. Kevin has 2 times what David has. How much do the have in their wallets

Step-by-step explanation:

Let d represent the amount David has. Then Heather has d+6 and Kevin has 2d. The sum of these amounts is ...

  d +(d+6) +2d = 90

  4d = 84

  d = 21 . . . . . .  David's amount

  d+6 = 27 . . .  Heather's amount

  2d = 42  . . .  Kevin's amount

g = (2, 2)

step-by-step explanation:

given the ratio is 1 : 1 then f is the midpoint of eg

let the coordinates of g = (x, y)

using the midpoint formula

(0 + x) = 1 ( multiply both sides by 2 )

0 + x = 2 ⇒ x = 2

similarly

(4 + y) = 3 ( multiply both sides by 2 )

4 + y = 6 ( subtract 4 from both sides )

y = 2

coordinates of g = (2, 2)

      2

  2 is to go somewhat to the top right of a because it is squared    

v= a h/3