Which system of equations is equivalent to the system of equations shown? 2x + 5y = -2 4x + 7y = 8 a) 6x - 12y = 6 and 4x - 10y = 4 b) 6x - 12y = 6 and 4x + 10y = -4 c) 6x + 12y = 6 and 4x - 10y = 4 d) 6x + 12y = 6 and 4x + 10y = -4

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.

Frank is lending $1,000 to sarah for two years. frank and sarah agree that frank should earn a real return of 4 percent per year. instructions: a. the cpi (times 100) is 100 at the time that frank makes the loan. it is expected to be 113 in one year and 127.7 in two years. what nominal rate of interest should frank charge sarah?