Plz need answer asap tia
which of the following demonstrates the commutative property of multiplication
a. 2(6a-3) = (6a-3) • 2

b. 2(6a-3) = 12a-6

c. 12a-6= (6a-3)•2

d. (2 • 6a) - 3 = 2(6a - 3)

Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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?