Explain how 3 2/4 - 1 3/4

Which expression will have the same sum as 3_8 + 1/4?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

The average daily maximum temperature for laura’s hometown can be modeled by the function f(x)=4.5sin(πx/6)+11.8 , where f(x) is the temperature in °c and x is the month. x = 0 corresponds to january.what is the average daily maximum temperature in may? round to the nearest tenth of a degree if needed.use 3.14 for π .