Let p=5-2i and q=-3+7i. Write the expression in the form a+bi:

p+q

Let w=23 . what is the value of w + 45 ?

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

From the beginning of the day the temperature rose 15 degrees so that by 4 pm it was 87 degrees. what was the temperature at the start of the day