I’ll give brainliest if you explain how to do 1 2 and 3:) no links plz!

5/7 =55

5x/7 =55

7 ⋅ 5x/7 = 7 ⋅ 55

5x =  7⋅ 55

x= 77

1/5/6 = 6x/6

x= 1/30

x+ 2.17 = 5

x+ 2.17 = 5 - 2.17 = 5 - 2.17

x=2.83

Step-by-step explanation:

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.

8

step-by-step explanation:

just put √(2) * √(32) into a calculator. that will make the answer be 8.