Question

if a psychologist tests whether there is any difference between how fast people work in the morning versus how fast they work in the evening, the research hypothesis is that:

Answer 1

Please help!
Choose the mathematical sentence that most accurately expresses the
information in the problem, and would be most helpful in solving it.
After taking 4 pieces of fruit out of a bag, 12 pieces of fruit remained. How
many pieces of fruit were in the bag to start?
A. 12 +/-4
B. 12 -4
C. 4+/- 12
D. 12-4-f
OE. +4=12
F. /-4-12