Question

1.3b^2 t 4b+1 when b=-2

2.3x+5 when x=4
3.5x-6 when x=-2
4.2x^2+1 when x=-5

Please help me is for today I don’t know what to do

Answer 1

1- 3(-2^2t)-7
2- 12+5=17
3- -10-6= -16
4- 2(-5^3)= -250

I can’t find the first one because of t