The number 3i is an imaginary number and a multiple of i. is it also a complex number? try to find values of a and
b so that 3i = a + b

The mean temperature for the first 4 days in january was 7°c. the mean temperature for the first 5 days in january was 5°c. what was the temperature on the 5th day?

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?