Hey can i get some help alsoo its need to be rounded to the nearest tenth

Find the slope of the line passing through a pair of points

Which of the following is the graph of y= square root -x-3

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?