Determine whether the given description corresponds to an observational study or an experiment. in a study of 444studentswith a particular disease, the subjects were photographed daily. nothingdoes the given description correspond to an observational study or an experiment? a. the given description corresponds to an observational study. b.the given description corresponds to an experiment. c.the given description does not provide enough information to answer this question.

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

Assume that 1400 births are randomly selected and 1378 of the births are girls. use subjective judgment to describe the number of girls as significantly high, significantly low, or neither significantly low nor significantly high. choose the correct answer below. a. the number of girls is neither significantly low nor significantly high. b. the number of girls is significantly high. c. the number of girls is significantly low. d. it is impossible to make a judgment with the given information.