Kevin watches a concert at the theatre. The concert ends at 8:40 pm.
It takes Kevin 22 minutes to get from his seat in the theatre to the train station.
Trains to Kevin's home leave the train station at the following times:
19:15
20:15
20:35
21:15
21:35
22:15
22:35

a)
Write down the time of the earliest train that Kevin can catch.

b)
How long will Kevin have to wait at the train station for, if he catches the
earliest possible train?

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The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0