Which of the following is an example of randomization a. repeating a study 10 times b. assigning test subjects to test groups arbitrarily c. studying the effects on both therapy and non therapy on students d. performing five different studies of the same drug

Arectangular exercise mat has a perimeter of 36 feet the length of the mat is twich the width writeand solve an equation to determine the length in feet. of the mat then find the area in square feet of the mart

Afurniture manufacturer produces chairs and sofas. each chair requires 10 yards of fabric, and each sofa requires 20 yards of fabric. the manufacturer has 300 yards of fabric available. to fulfill orders, the number of sofas must be at least twice the number of chairs. let x be the number of chairs and y the number of sofas. which inequalities are described in the problem? check all of the boxes that apply

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?