The average temperature for a country during September 2013 was 65.2 degrees Fahrenheit. This is 4.6 degrees Fahrenheit above the 20th-century average temperature for September. What was the country's 20th-century average temperature for September?
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The country's 20th-century average temperature for September was degrees Fahrenheit.
(Type a whole number or a decimal.)
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Ineed with number 17 i don’t get it at alll

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.

If the discriminant if a quadratic equation is 4 which statement describes the roots?