Question

3r – 5t – 4rt
r=-4 t=3

Answer 1

i think you are supposed to replace \(r\) by \(-4\) and \(t\) by \(3\) which will give you
\[3\times (-4)-5\times 3-4\times (-4)\times 3\]

Answer 2

then some arithmetic to get the actual number

Answer 3

idk how to do it though