Question

Help ASAP plsssssssssss

Answer 1

5n+3n = 15+9= 24

9(x-7)-u= 9(11-7)-19= 9*4-19= 36-19=17

Have a nice day

Answer 2

If you already know the value of n, all that's necessary to do for these problems to simply plug in it as shown:

1.)
`5n + 3n --> 5(3) + 3(3)`

--->
`15 + 9 = 24`

2.)
`9(x - 7) - y` -->
`9(11 - 7) - 19`

--->
`9(4) - 19`

---->
`36 - 19 = 17`