I WILL MARK THE BRAINLIEST THE SECOND I GET IT CORRECT. PLEASE HELP.

(3)/(10) x- (5)/(7) y-4 (5)/(6) y-2 (4)/(5) x

Simplify the expression. -2/5(10+15m-20n)

Human body temperatures have a mean of 98.20° f and a standard deviation of 0.62°. sally's temperature can be described by z = 1.4. what is her temperature? round your answer to the nearest hundredth. 99.07°f 97.33°f 99.60°f 100.45°f

Aresearch study is done to find the average age of all u. s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample