HELP ME Select all the statements that are true for the following systems of equations System A 2x-3y=4 4x - y = 18 System B 3x - 4y = 5 y = 5x+3 System C 2x-3y = 4 12x-3y = 54 Systems A and B have different solutions System C simplifies to 2x - 3y = 4 and 4x - y = 18 by dividing the second equation by three Systems B and C have the same solution Systems A and Chave the same solution All three systems have different solutions

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

Combine the information in the problem and the chart using the average balance method to solve the problem.

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.