A concession stand at a basketball game sells hamburgers and soda. Each hamburger costs $2.99 and each soda costs $1.99. At the end of the evening, the concession
stand made a total of $447. There was total of 187 hamburgers and sodas
combined sold. Which system of equations can be used to determine how many
hot dogs were sold and how many hamburgers were sold?

Pls as soon as ! will award brainliest and 20 ! also the answer is not 22.5 degrees! find the value of x in each case:

The graph represents f(x)=[x]+3. what is f(-2.2)?

At the beginning of a call to the cable company, a message tells customers, "after you finish talking to our customer service representative, you will be asked to take a five-question survey about the level of service you recieved. it would be appreciated if you could stay on the line to answer the survey questions." what type of sampling is the cable company using?