Video streaming company a charges a one-time $40 membership fee and $2 per video stream. video streaming company b charges a one-time $20 membership fee and $4 per video stream. let the variable s represent the amount of videos streamed and let the variable c represent the cost. for how many video streams will the cost be the same for both companies? which system of equations can be used to solve this problem? a: {c=40s+2c=20s+4 b: {c=42sc=24s c: {c=40−2sc=20−4s d: {c=40+2sc=20+4s

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

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

Billie holiday sells children's clothing for sara vaughn's toddler shop. baby blankets sell for $29.99 after a markup rate based on cost of 109%. find the cost and the markup.