Three friends owe $18 to another friend for gas. if they plan to split the cost evenly, which of the following expressions could they use to find how much they each owe? 18 ÷ 3 18 ÷ -3 -18 ÷ -3 -18 ÷ 3

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?

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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