What’s greater -3 or -4

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

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 .