Which of the following is not a characteristic of both experiments and surveys?
A. The data collected might be studied for patterns.
O B. Subjects should be randomly selected
C. Data are collected about a population.
D. The researcher exercises direct control over at least one variable.

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

The graph below shows the height of a projectile t seconds after it is launched. if acceleration due to gravity is -16 ft/s2, which equation models the height of the projectile correctly?

Fill in the blank 1. a rhombus is a rectangle a) always b) sometimes c) never 2. a square is a quadrilateral a) always b) sometimes c) never 3. a trapezoid is a kite a) always b) sometimes c) never 4. a quadrilateral is a kite a) always b) sometimes c) never 5. a square is a rhombus a) always b) sometimes c) never 6. a parallelogram is a rectangle a) always b) sometimes c) never