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mrs. bell's class is selling hobbs middle jaguar t-shirts to raise money for a trip. they typically sell 400 t-shirts a year for $10 per shirt. mrs bell knows that for every $1 increase in price, they will sell 20 less t-shirts. what is the revenue function r(x), where x represents the $1 price increases and revenue is equal the number of t-shirts sold times the cost of each shirt

Ineed me i stuck and i don’t want to get it wrong

The avenues in a particular city run north to south and are numbered consecutively with 1st avenue at the western border of the city. the streets in the city run east to west and are numbered consecutively with 1st street at the southern border of the city. for a festival, the city is not allowing cars to park in a rectangular region bordered by 5th avenue to the west. 9th avenue to the east, 4th street to the south, and 6th street to the north. if x is the avenue number and yis the street number, which of the following systems describes the region in which cars are not allowed to park? 5th ave 9th ave

Write each of the following numerals in base 10. for base twelve, t and e represent the face values ten and eleven, respectively. 114 base 5 89t base 12