3) Can the following be lengths of the sides of a triangle? Why or why not?
a. 12, 15,3
b. 8. 8,5

b can be

a can not be

Step-by-step explanation:

the sides of a triangle have to add up

for example a can not be because 12 + 3 = 15 and that is the same length of one of the sides

but

b can be because 8 + 5 = 13 and that is greater than all of the sides

i hope this helps

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: