Giải hệ phương trình tuyến tính sau bằng phương pháp Gauss-Jordan {2x1 - x2 - x3 = 4
{3x1 + 4x2 -2x3 = 11
{3x1 - 2x2 + 4x3 = 11

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Determine the common ratio and find the next three terms of the geometric sequence. 10, 2, 0.4, a. 0.2; -0.4, -2, -10 c. 0.02; 0.08, 0.016, 0.0032 b. 0.02; -0.4, -2, -10 d. 0.2; 0.08, 0.016, 0.0032 select the best answer from the choices provided a b c d