If x = 1 and y = 2 is the solution to the simultaneous equations ax + by = 2 and bx + a^2 = 10, find the possible values of a and of b.

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.

The computer that controls a bank's automatic teller machine crashes a mean of 0.6 times per day. what is the probability that, in any seven-day week, the computer will crash less than 5 times? round your answer to four decimal places

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20