Which expression is equivalent to 12 – 40 A. 12 + (+40)
B.12 + (-40)
C.-12 + (+40)
D. -12 + (-40)
This is my final please answer quick

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

For each sentence below, find the value of x that makes each sentence true. (515) 5 = 25* x= (813)2 = 4* x=

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?