Can someone answerrr the questions for me pleaseee<3

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3

Which of the following would be a reasonable estimate for the weight of a pencil? a. 1 × 10^-20 lb b. 1 × 10^20 lb c. 1 × 10^2 lb d. 1 × 10^-2 lb