8x +9 = 6x + 21 where x = number of chairs in each row
2x=12
x=6
sub back into original equation 8 x 6 + 9 =57 chairs
Answer:
2⋅2⋅2⋅5=40 2 ⋅ 2 ⋅ 2 ⋅ 5 = 40
D. (I used 3.14 as pi so my answer was a little off so I just went with the one closest to my answer)
25 x 0.1 = 2.5 ≈ 3
25 + 3 = 28
The machinist would make about 28 on Wednesday
