Determine whether the given description corresponds to an observational study or an experiment. A quality control specialist compares the output from a machine with a new lubricant to the output of machines with the old lubricant.

Ac contractor is building a new subdivision outside of the city. he has started work on the first street and is planning on the other streets to run in a direction parallel to the first. the second street will pass through (-2,4) find the equation of the location of the second street in standard form. a.2x+y=2 b. x-y=2 c.2x+y=2 d. x+y=2

What is the value of x? enter your answer in the box.

Asingle die is rolled twice. find the probability of rolling a 3 the first time and a 2 the second time