Geometry math question no guessing and show work you

In an isosceles triangle , two sides are equal

so we check for option A and C

let us check for each,

option A:

1,1,3

sum of two sides > third side

but here 1+1<3

so this cannot be possible triangle

option C:

{6,6,5}

6+6 =12 >5

6+5=11>6

so it satisfies both the conditions, so option C {6,6,5} is correct

93.8

step-by-step explanation:

lets say, first number = x

second number = 3x+7

total = 49

(x)+(3x+7)= 49

4x+7 = 49

4x = 42

x = 42/4

x= 10.5

x= 10.5

3x+7 = 3(10.5)+7 = 93.8

hope this

practice. practice. practice.