Answer:
A
Step-by-step explanation:If you subtract a negative number you always add remember that.
18 quarters
just do trial and error. It's easy!
Answer:
D m = 
Step-by-step explanation:
factor the expressions in the denominator and the numerator to simplify the expression:
=> 
=> 
to make a fraction undefined, the numerator should be 0, thus, we substitute the values of m from the options into the denominator to make the denominator equals to 0:
=>
=
= 
in this case, the values of m from option D make the denominator of the fraction equals 0.
The vertical distance can be found by subtracting parabola from the given line.
Given line equation is y= x+20
Equation of parabola is y= x^2
Subtract parabola from line equation
so y = 
y = 
Now we take derivative to find out the maximum that is the vertex
y' = -2x + 1
Now we set derivative =0 and solve for x
0 = -2x+1
2x = 1

Now we plug in x values in 

Take common denominator

So our maximum vertical distance is
at 