The equivalent expression the equation 12+4x is 4(3+x) using the distributive property.
start with y= m(x+9)
Use the distributive property:
y= mx+9m
Now you want x to decrease by 6:
so y ' = m(x-6) + 9m
Use distributive property again:
y'= mx - 6m + 9m
y' = (mx+9m) - 6m
y' = y - 6m
So the value of y decreases by 6m.
The answer of this question is b
Desert Shores is below the sea level and the difference is more than 600 feet
