Malia works at a movie theater and is paid hourly. one month, she earned $388.80. the total amount she earns can be found using the equation y = 8.1x, where x is the number of hours she works and y is the total amount she earns in dollars. bill works at a golf course and is also paid hourly. the table shows the total amount he is paid for different numbers of hours worked. the number of hours: 18, 28, 35. total number earned: 144.90, 225.40, 281.75. how do the units compare?

An electronics manufacturer wants to know if customers would be interested in a detachable keyboard for their tables and if so, what the most important features would be. the manufacturer partners with an electronics store to include copies of the survey with every purchase at that store for one week. which of the following best explains why this random sample is unlikely to be a good representative sample of tablet owners' preferences for a detachable keyboard? a) one week is likely not enough time to get a large enough sample. b) most people won't bother to send in the survey, which is likely to skew the results c) there is no way to verify whether the responders to the survey actually own a tablet d) the survey is biased because it was conducted through an electronics store, not the general population

What is the value of x when x + 7 = 21?

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?