Carlos is using a number line to add another integer to –4. he begins by showing –4 on the number line, as shown below. carlos adds the other integer on the number line and says that the sum is negative. which is true of the number carlos added to –4?

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?