A group of college students believes the average grades in psychology courses are different than the average grades in biology courses. The group found the average psychology grades of a sample of 12 students was 85.4 and the average biology grades of a sample of 11 students was 81.2. What is the null hypothesis for this study

b

step-by-step explanation:

given

- 2 (3x + 12y - 5 - 17x - 16y + 4 )

simplify the parenthesis by collecting like terms

= - 2 (- 14x - 4y - 1) ← distribute the parenthesis by - 2

= 28x + 8y + 2 → b

step-by-step explanation:

6.48/4 4 goes into 6.48 1.62 times

answer: they are supplementary angles

step-by-step explanation: 161+19=180. supplementary angles equal 180 degrees