What value of a makes the equation true 30/45=6/a

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g

Acarton of juice contains 64 ounces miss wilson bought six cartons of juice how many ounces of juice did she buy

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 .