Answer:
4.A
5.c
Step-by-step explanation:
4.112+x=180
x=180-112=68
A
5.
7x+3x-30=90
10x=90+30
10 x=120
x=12
c
i think it is..
Answer:21
the product of −1 and −3
(-1)×(-3)
= 3