129,407 because 12 ten thousands is 120,000 and 8 thousands is 8,000. 14 hundreds is 1,400 and 7 ones is 7 so 120,000+8,000+1,400+7=129,407
The sum of slopes of lines b and c are 0
1.53 hours if she drove 40 mph it would be 1 hour
<h2>
Hello!</h2>
The answer is: 
<h2>
Why?</h2>
Quadratic function describes the graph of a parabola and they are formed by a quadratic term (
) a linear term (
) and a constant number (c). Quadratic terms have an exponent of 2 and linear terms have an exponent of 1.
For this situation, we have only the quadratic term () which is enough to know that there is a quadratic function.
Have a nice day!
