Social studies nautical flags are used by ships for signaling.
flipping a flag vertically can be a sign of distress. the flag
representing the number 7 is shown. where is the yellow side
if the flag is flipped vertically? explain.

sorry can't

step-by-step explanation:

i googled though and something came up but it was in science langueage not common english sooo

step-by-step explanation:

your mom

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -