4abcd+(a^2+b^2)(c^2+d^2) ^2-4 cd(a^2+b^2)+abc(c^2+d^2) ^2
help me please :((

Can someone answer it, and plot it, for 20 points and brainliest answer? p. s. they're the same ! : )

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse

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