Select the correct answer.
which system of equations corresponds to this matrix multiplication operation?
a.
5x + 2x + x = 16; 7y - 5y + 2y = 3; -5z + 3z + z = 12
b.
5x + 2y + 2 = 16; 7x - 5y + 2z = 3; -5x + 3y + z = 12
nn
c.
5x + 7y + -5z = 16; 2x - 5y + 32 = 3; x + 2y + z = 12
d.
5x + 7y + -52 = 12; 2x - 5y + 3z = 3; x + 2y + z = 16

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4