Convert negative 31 degrees fahrenheit to celsius.

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Prove that 16^4-2^13-4^5 is divisible by 11.