All the triangles are isosceles meaning that they have to sides that are equal
It’s the second one it’s right
27.75/5 = $5.55 per book
32.16/6 = $5.36 per book
The online store is the cheapest because it has the lowest unit rate
6=.75x
x= 8 hours for the whole race
Answer: below in picture
explanation: also in picture