Atoy factory creates handmade train sets. one train car takes 0.4 hours to construct and 0.6 hours to paint. a section of wooden track requires 0.2 hours to construct and 0.1 hours to paint. a full train set with x train cars and y sections of wooden track takes 5.2 hours to construct and 4.2 hours to paint. which system of equations can be used to find the number of train cars and number of sections of wooden track in a full train set?

What are the digits that repeat in the smallest sequence of repeating digits in the decimal equivalent of 24/11?

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?

In a test for esp (extrasensory perception), the experimenter looks at cards that are hidden from the subject. each card contains either a star, a circle, a wave, a cross or a square.(five shapes) as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. when the esp study described above discovers a subject whose performance appears to be better than guessing, the study continues at greater length. the experimenter looks at many cards bearing one of five shapes (star, square, circle, wave, and cross) in an order determined by random numbers. the subject cannot see the experimenter as he looks at each card in turn, in order to avoid any possible nonverbal clues. the answers of a subject who does not have esp should be independent observations, each with probability 1/5 of success. we record 1000 attempts. which of the following assumptions must be met in order to solve this problem? it's reasonable to assume normality 0.8(1000), 0.2(1000)%30 approximately normal 0.8(1000), 0.2(1000)% 10 approximately normal srs it is reasonable to assume the total number of cards is over 10,000 it is reasonable to assume the total number of cards is over 1000