Question

HELP HELP PLSSSSSSSSS

Answer 1

9) c) 1

10) c) 215

Explanation:

Step:1

Given that the expression

`(31+r)/(2) - (9r-5)/(4)`

Put r = 9

=
`(31+9)/(2) - (9(9)-5)/(4)`

=
`(40)/(2) -(76)/(4)`

= 20 - 19

=1

Step(ii):-

Given that

`(5(4r-16))/(5) +13(3r-12)`

Put r = 9

=
`(5(4(9)-16))/(5) +13(3(9)-12)`

= 20 + 13(15)

= 215