Which statements are true about the ordered pair (5, −6) and the system of equations? {x+y=−13x−y=21 Select ALL correct answers. A. The ordered pair (5, −6) is a solution to the first equation because it makes the first equation true. B. The ordered pair (5, −6) is a solution to the second equation because it makes the second equation true. C. The ordered pair (5, −6) is a solution to the system because it makes both equations true. D. The ordered pair (5, −6) is not a solution to the system because it makes at least one of the equations false.

Which sums are equal to 1hold 6/8? choose all answers that are correcta.1/8+6/8b.12/8+2/8c.8/8+1/8+1/8+1/8+1/8+1/8+1/8d.8/8+6/8

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab