Answer:
David got it correctly
Step-by-step explanation:
5.6 x 10=56 not 0.56
7.21 X 100= 721 not 0.721
Answer: 2
Step-by-step explanation:

Answer:
3*8 = 24 and 5*4 = 20. Multiply the two denominators: 8*4 = 32.
Step-by-step explanation:
3/4+z=5/6
Find the common denominator which is 12 for 3/4 and 5/6.
Multiply by 3 for 3/4.
Multiply by 2 for 5/6.
3(3)/4(3)=9/12
5(2)/6(2)=10/12
9/12+z=10/12
Move 9/12 to the other side. Sign changes from 9/12 to -9/12.
9/12-9/12+z=10/12-9/12
z=1/12
Answer: z= 1/12