The intersection of the graphs of two linear equations an be located n a cartesian grid by starting at the origin, moving 7 units down. Which of these is a solution to the system of equations? A. x y = - 5 B. x =x- 7: y = 5 C. x = - 5: y =- 7 D. x = 5: y = 7

Ametal rod is 2/5 meters long. it will be cut into pieces that are each 1/30 meters long. how many pieces will be made from the rod?

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

Find the quotient 9(cos135+isin135)/7(cos10+isin10)