In a coordinate plane, triangle ABC has vertices A (1, 1), B(1,5), and C (5, 1). Triangle ABC is dilated by a scale factor of 2 with the origin as the center of dilation, resulting in triangle A'B'C'.
What is the length, in units, of A'B'?
A. 2
B. 4
C. 6
D. 8

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.

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.