Which expression is equivalent to the following complex fraction? 1/x-1/y / 1/x+1/y a. y+x/y-x b. (y-x)(y+x)/ x^2 y^2 c. x^2 y^2/ (y+x) (y+x) d. y-x/y+x

Use the matrix-column representation of the product to write each column of ab as a linear combination of the columns of a.

Which rational number could be graphed between -4 and -5

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 .