A flare is designed to follow the path modeled by the function
h(t) = -1672 + 100t, where t is the time elapsed, in seconds,
and h(t) is the height, in feet, of the flare at that time. The
function m(h)= h/3.2808 can be used to convert the height in feet
3.2808
feet to the height in meters.

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 -

i can answer this if i have the answer choices