Hansel is skiing down a mountain at a rate of 14m every 5 seconds and his friend Gretel is snowboarding down the same mountain at a
rate of 17m every 7 seconds. If it 2400m to the bottom of the
mountain, who will reach the bottom first, and how long will it take
them?

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 -

x=25?

i think this is the answer hope this

step-by-step explanation: