What is the sum of -3/5 and -1/5?
OA) -4/5
OB-2/5
O C) 2/5
D) 4/5

How do i do this activity, is appreciated

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

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4