The equation 9+12m=6+15(m-1) models the following situation: movie-rental company a charges a sign-up fee of $9 plus $12 per month, and company b charges $6 for the first month plus $15 per month after that. at a certain number of months, the cost of the two companies is equal. which equation is a simplified version of the one above?

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.

Which of the following is the major negative aspect of crossover designs for research studies? a. prohibitive cost b. residual effects c-subject drepout d. incomplete randomization e. large sample size required