A group of adults plus one child attend a movie. Tickets cost $9 for adults and $6 for children. The total cost for the movie is $78. Write an equation to find the number of
adults in the group.

(a) the volume of the cone is 20/3 in3

hence, option a is correct.

to have more of what you want like money

step-by-step explanation:

save it by not spending on unnecessary stuff and have more

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 -

you could deduce the conclusion directly using the facts pertaining to the specific situation.

hope this .