plz quick will mark brainlest

find an equivalent system of equations for the following system:

x + 2y = 2
−4x + 4y = −8

a. x + 2y = 2
−4x − 2y = 10

b. x + 2y = 2
5x + 4y = 8

c. x + 2y = 2
5x − 2y = 10

d. x + 2y = 2
5x − 2y = −8

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x