Answer:
1) A
2) A
3) B
4) D
5)A
6) D
7) A
8) C
9) D
Step-by-step explanation:
1) -5 (-2) -6= 4
2) 3 coins plus c coins = 3 + c
3) x-2 =16, x = 18
4) =-5. Clearing, z = 60
5) x =13,4
6) 14=t-4. Clearing t = 58
7) -30=j+50, clearing j=80
8) 2.8x=-9.24, clearing x=-3-3
9) 5.8= . Clearing z=12.76
0.3055555 it means 0.306
7z -3x -3 is the solution to the equation
7z -5 -3x +2
7z -3x -5+2
7z -3x -3
no
3/2*3/2= 9/4
9/4= 2 1/4