Ill give brainliest for help with algebra. random answers will be reported. 1. bette drives at 60 miles per hour for 2 1/2 hours and at 75 miles for 1 1/2 hours. what is her average rate of speed?
2. kim has $4.75 in nickles and dimes. if she has twice as many dimes as nickels, how many of each coin does she have?

Stu and ambrose are working together on a study of whether diet is related to students' mental health. first, they randomly select 10 students from the student center and 10 students from the office of counseling and psychological services. then, they ask students to rate their diet in terms of healthiness on a scale of 1-100 before completing a 20-item mental health survey. a) name one of the constructs being studied b) how was the construct you named above operationally defined in this experiment? e) was the variable you described above their independent variable, their dependent variable, or a controlled variable? d) what is a confounding variable? what is a potential confound in this study?