Answer:
Step-by-step explanation:
19-12=7, so 4-7=-3, so b is equal to 19
2x(-2x-3)=
=2x*(-2x)+2x*(-3)=
=-4x²-6x
31.
The mode is the value which occurs the most.
Stem = 3 and leaf = 1, 1,6 so that is 2 31's.