Given that these simultaneous equations x - y = k
x² + y² – 9=0
have exactly one pair of solutions, show that k = +3V2.

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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

Let d be the domain and let ƒ be the possible function. determine if the relation is an example of a function. d = {x| x is a date, expressed in day/month/year} ƒ(x) = temperature in seattle washington on that date