Approximately how many times greater is 8.5×108 than 3.4×105 ? a 2.5 b 250 c 2,500 d 25,000

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

Ireally need subtract and simplify.(-y^2 – 4y - 8) – (-4y^2 – 6y + 3)show your work, ! i will mark you brainliest but you have to show your work.

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?