Please Help multiple choice! Brainlest to babyyy

C and D

Step-by-step explanation:

We want to find the equations where b=11 is a solution. Let's test each answer. choice. Plug 11 in for b and solve.

A. 2b= 211

2(11)=211

Multiply 2 and 11.  

22≠211

22 does not equal 211, therefore this choice is not correct.

B. b+18=7

11+18=7

Add 11 and 18.

29 ≠ 7

29 does not equal 7, so this is not correct.

C. 77=7b

77=7(11)

Multiply 7 and 11.

77=77

77 does equal 77, so this is correct.

D. 9=b-2

9=11-2

Subtract 2 from 11.

9=9

9 equals 9, so this correct too.

E. 11=33/b

11=33/11

Divide 33 by 11.

11≠3

11 does not equal 3, so this is not the right choice.

b= 11 is a solution for C. 77-7b and D. 9=b-2

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.