Ivan tried to evaluate the expression 6 - 2 + 4 x 9. here is his work:
6 - 2 + 4 x 9
= 6 - 2 + 36
step 1
= 4 + 36
step 2
= 40
step 3
is ivan's work correct?
ewno, ivan made a mistake in step 1. ivan should have subtracted first. the
order of operations says to work from left to right.
no, ivan made a mistake in step 2. ivan should have added before he
subtracted. the order of operations says to add before you subtract.
yes, ivan's work is correct.

Neoli is a nurse who works each day from 8: 00 am to 4: 00 pm at the blood collection centre. she takes 45 minutes for her lunch break. on average, it takes neoli 15 minutes to collect each sample and record the patient's details. on average, how many patients can neoli see each day?

What are the greatest common factor of 75 and 30

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?