Is it possible to solve the system {3x-2y=10][ x+2y=6} by using substitution? if so, explain how. which method substitution or elimination, is more efficient? why?

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

Solve 4 ln x=2ln25 a) x=5 b) x=25 c) x=625

The scatter plot shows the number of animal cells clara examined in a laboratory in different months: plot ordered pairs 1, 20 and 2, 60 and 3,100 and 4, 140 and 5, 180 what is the approximate predicted number of animal cells clara examined in the 9th month?