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which rule yields the dilation of the figure bcde centered at the origin?
a) (x, y) → (4x, 4y)
b) (x, y) → (1/4x,1/4y)
c) (x, y) (x+4, y+4)
d) (x, y) (x+ 1/4, y + 1/4)

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

The ratio of rock songs to dance songs on jonathan’s mp3 player is 5: 6. the total number of rock and dance songs jonathan has is between 101 120. how many rock songs does he have?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?