A circular ice rink is being built in town. Around the ice rink, a walkway will be built. The ice rink will have a diameter of 80
80
feet and the walkway will be 10
10
feet wide. What is the approximate area of the walkway?

so, converting firstly the mixed fractions to improper fractions and then "adding".

i think it might be a but you might want a second opinion

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 -