PLEASE HELP ME!! PERSON WHO GETS ALL RIGHT WILL BE MARKED AS BRAINLIST !!! (please look at image)

a computer store offers customers a protection plan when they a buy a computer. a research company determines that for every 5$ increase in the price of the plan, the store will sell 3 fewer plans per month. please answer the following questions given in the image .

What is the value of y? round to the nearest tenth

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

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