The Right Answer:
We need to mutiply all the numbers.
5*-2 = -10
-10*-1 = 10
The Wrong Answer:
(-2)*(-1) gives +2 (a negative number multiplied for another negative gives a positive number).
2*5 = +10
<span>this is pretty hard but here is your answer
</span>
y = x^2 - 10x + 25 - 25
<span> y = (x-5)^2 - 25 </span>
<span> y+25 = (x-5)^2 </span>
<span> x-5 = +/-sqrt(y+25) </span>
<span> And you get TWO
inverses: </span>
<span> x = 5 + sqrt(y+25),
for x>=5 </span>
<span> x = 5 - sqrt(y+25),
for x<=5</span>
160,000 - 40,000= 120,000/4 = 3 sets of new tires in the first year and 4 every consecutive year.
