Which one is the correct answer?

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?

Pls the last one and it has to be like number 6

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read