I think the answer to this is .6 or 1.7
81-1= 80
80 / 2 = 40
D = 40
So:
40(2) = 81 - 1
Answer: C
Step-by-step explanation:
To a decimal you can round it down to .5 but if its a fraction no.
You can choose to answer this with fractions or decimals. I'll choose fractions because we won't need calculators. 22 1/2 miles "in" 1/3 hour, means 22 1/2 mi divided by 1/3 hour.
22 1/2 = [(22×2) + 1] ÷ 2 = 45/2
So (45/2)mi ÷ (1/3)hr is the same as (45/2) × (3/1), or (45×3)/2 = 135/2, which is 67 1/2, or 67.5 mi/hr (mph).
