How would the numbers 6870000 appear in scientific notation on a calculator screen

For the function, f(x) = -5x 2, find f(-4).

What value of x is in the solution set of 4x – 12 s 16 + 8x?

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