apply the distributive property to factor out the greatest common factor of all three terms. 9a - 18b + 21c =

3(3a-6b+7c)

Step-by-step explanation:

9a-18b+21c=3(3a-6b+7c)

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.

step-by-step explanation:

left be aligning the decimal points is required to not required see the number of digits to the right