Answer :
The latest time Mr. Potter's class can start the test and still finish by 11:40 is 10:10.
What is an expression?
An expression contains one or more terms with addition, subtraction, multiplication, and division.
We always combine the like terms in an expression when we simplify.
We also keep all the like terms on one side of the expression if we are dealing with two sides of an expression.
Example:
1 + 3x + 4y = 7 is an expression.
3 + 4 is an expression.
2 x 4 + 6 x 7 – 9 is an expression.
33 + 77 – 88 is an expression.
We have,
If Mr. Potter's class needs to finish the test by 11:40 and the test takes 1 1/2 hours,
We can find the latest time they can start the test by subtracting 1 1/2 hours from 11:40.
To subtract 1 1/2 hours from 11:40, we need to convert 1 1/2 hours to minutes.
There are 60 minutes in an hour, so 1 1/2 hours is:
= 1(1/2) hours
= 1 x 60 + 1/2 x 60
= 60 + 30
= 90 minutes
Now we can subtract 90 minutes from 11:40:
= 11:40 - 90 minutes
= 10:10
Therefore,
The latest time Mr. Potter's class can start the test and still finish by 11:40 is 10:10.
Learn more about expressions here:
https://brainly.com/question/3118662
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10:10 because you subtract 1 hour and 30 mins from the original time
