x/r - s = t
Add s to both sides.
x/r - s + s = s + t
x/r + 0 = s + t
x/r = s + t
Multiply both sides by r.
r(x/r) = r(s + t)
x = r(s + t)
Understand?
Answer: 0.000274 dragon fly per day.
Step-by-step explanation:
First convert the 10 years into days:
10 × 365 = 3650 days.
This means that one dragon fly dies every 3650 days.
Now, to find how many that dies in a day:
1 ÷ 3650 = 0.000274, corrected to three significant figure.
Looks more like a probability question.
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Please open the image to see the answer so the first one
Answer:
Number of orders seen on last Tuesday = 605
Step-by-step explanation:
Number of orders seen on Tuesday = 600
It is given that it is 0.85% less than last Tuesday.
Let number of sales on last Tuesday = 
As per question statement:
Number of order on last Tuesday - 0.85% of Number of order on last Tuesday = 600
OR
i.e. if we subtract 0.85% of x from x, it must be equal to 600.

So, there were about 605 order seen last Tuesday.