enter fair. each ride costs$2.50. you have $21.50. how many rides can you go on? Type your equation. Let x = number of rides

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Acar loses a quarter of its value every year. it is originally worth $35,000. to the nearest dollar,how much will the car be worth in 8 years?