Answer:
You can buy 40 tacos
You have enough money
Step-by-step explanation:
Given


--- missing from the question
Required
Determine if you have enough amount
The number of Tacos that $20 can afford is calculated as:

So, we have:


-- i.e. the number of Tacos will go round the 37 students
Hence, you have enough money
The correct answer is :
A translation by 6 units up.
Answer: Time taken by pipe C to empty the tank = 5 hours.
Step-by-step explanation:
Pipe A can fill a tank in 5 hours.
Let time taken by Pipe C = x ( hours)
Time taken by Pipe B = x-2 ( hours)
Now, with all 3 pipes open, it takes 3 hours to fill the tank, it can be represented as

Time cannot be negative,
So, x=5
Thus, Time taken by pipe C to empty the tank = 5 hours.
In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data
7.1 x 10-3
standard form = ?
Step 02:
standard form
7.1 x 10-3 ====> 0,0071
The answer is:
0,0071