Answer:
19 minutes 39 seconds
Step-by-step explanation:
In 7 days, Anthony has improved his time by ...
7 × 3 seconds = 21 seconds
The time that is 21 seconds shorter than 20 minutes is 19 minutes 39 seconds.
Anthony's time today is 19:39 minutes:seconds.
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You are expected to know that there are 60 seconds in a minute.
18
The factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
The factors of 18 are 1, 2, 3, 6, 9, 18
The common factors are 1, 2, 3, 6, 9, 18
The greatest common factor = 18
A
A because when you add the angles up it has to equal 180
