9/10 = z/8
cross multiply
9/10(10)(8) = z/8(8)(10)
9(8) = z(10)
72 = 10z
Isolate the z, divide 10 from both sides
72/10 = 10z/10
z = 72/10
z = 7.2
7.2, or D) is your answer
hope this helps
90 - 64 = ? ...................
Answer: 9.53x10^-5
Step-by-step explanation:
Scientific notation means the coefficient must be between 0 and 10 and preferably without zeros because they are implied. move the decimal 5 times to the right to get 9.53 as your coeifficient and state the movement of the decimal
21, there’s 7 days in a week and three weeks so that would be 3x7=21
