(b/2)^2=(−5)^2
x^2−10x+(−5)^2=<span>24+<span>(−5)^<span>2
</span></span></span><span><span>x^2−10x+25</span>=49
</span><span><span>(x−5)^</span>2</span>=<span>49 (square root)
</span><span>(<span>x<span>−5</span></span>)</span>=<span>±<span>7
x-5=7 => x=12
x-5=-7 => x=-2</span></span>
1. Unit cost
18/3 = 6
2. When x = 1
In the graph I believe (1, 8)
Unit cost as 8
3. At Manglo since the unit cost is lower
4. 54/9 = 6
Noah runs 6 miles per day
Noah would win (5, 30)
Greta wins (5,45)
Greta wins more miles
I find it easiest to convert the fraction to over 100 ex. 1/2 is 50/100 then the decimal is .50
I think it’s d but sorry if it’s not right
