determine the unknown side of the similar triangle.
a) 2
b) 3
c) 4
d) 5

4 is correct. Set up a ratio relationship between similar triangles.

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.

it goes right