125 thousands=1 tenththousandths

After being rearranged and simplified, which of the following equations could be solved using the quadratic formula? check all that apply. a. 9% + 3x2 = 14 + x-1 b. -x+ + 4x + 7 = -32-9 c. 5x + 4 = 3x4 - 2 d. 2x2 + x2 + x = 30

Can some one me with these questions

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.