Question

Need help on 15 & 16!

Answer 1

15.
if <A = 84° then

`4x + 18 = 42`

`4x = 24`

`x = 6`
if x = 6 then..

`7x + 4 = 7(6) + 4`

`m < r = 7(6) + 4`

`m < r = 42 + 4`

`m < r = 46`

I can't see enough of 16 to help on that one