A picture is twice as long as it is wide. The frame adds 5 centimeters to each
dimension. If the area of the frame
alone is 250 cm?, find the length and
width of the picture.

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?