Answer:
You may divide by a variable. But only if you know the variable is non-zero. So, if setting the variable to zero makes both sides of the equation zero, we have a solution that that variable is 0, or the equation with the variable divided out holds. E.g. solve x(x-1) = 0.
so yea have a grate day
the Doppler effect
it is the change in frequency or wavelength of a wave for an observer moving relative to its source
Answer:
line 1 to the right
Explanation:
For a decreasing function, the slope is negative and a line with a negative slope slants downward from left to right
