Which data set has the same standard deviation as the data set {1, 1, 3, 5, 8}? a. {1, 2, 6, 6, 9} b. {2, 2, 4, 6, 9} c. {9, 8, 9, 8, 9} d. {1, 1, 1, 2, 2}

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

Harold wrote this equation to model the level of water in a pool over time. the variable x represents time in hours. f(x) = 3,500 - 225x which statements about the situation are true? check all that apply. the water level is rising. the water level is falling. the initial level of water in the pool was 3,500 units. the initial level of water in the pool was 225 units. the pool was empty after 14 hours. the water was 2,600 units high after 4 hours.

Lena draws a square with an area that is greater than the area of rectangle b. what are two possible side lengths of lena's square? explain.