What is the area of a circle with a diameter of 16 centimeters? A. 50.24
B. 100.48
C. 200.96
D. 803.84

Ill mark the brainliest if you me with the these three questions 7,8,9

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14

Can someone me with this? i’m not sure what to put for my equations.