What is 68,127,000,000,000,000 in scientific notation

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

Solve -.016x= -16. need solving this

The function f(x)= -(x+5)(x+1) is down. what is the range of the function?