A group of 8 friends went to lunch and spent a total of $76, which included the food bill and a tip of $16. They decided to
split the bill and tip evenly among themselves
Which equations and solutions describe the situation? Select two options,
The equation (x+18) -
represents the situation, where x is the food bil,
The equation
(% 15) - 18 represents the situation, where x is the food bill
The solution
80 represents the total food bill
The solution
80 represents each friend's share of the food till and tip
The equation B12 15- 78 represents the situation, where
is the food bl.

Aresearch study is studying the effects of a new drug for osteoporosis alzheimer's disease (ad) for women above the age of 65 years. a group of individuals with osteoporosis is randomized into two groups. one group is treated conventionally, and the second group is treated with the new medication. assessments are made at 3, 6, 12, 36, and 48 months. the conventionally treated group is assessed for ad using a serum blood test, and the treatment group is assessed for ad using a pet radiotracer that binds to beta-amyloid plaques. in comparing these 2 trial arms, the authors of the study may encounter which type of bias? a. selection bias on the risk of developing b. measurement bias c. confounding bias d. recall bias e. lead-time bias