Sara says, "If you subtract 12 from my number and multiply the difference by - 3, the result is - 45." What is Sara's number?

Step-by-step explanation:

Let Sara's number be . Now, we can build an equation.

We have that . Aha! Now we have a path to the solution!

We can divide both sides of the equation by to get .

Lastly, we add to both sides to get .

So, Sara's number is .

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.  

step-by-step explanation:

given that ab is divided into equal parts as

ac, cd, de, ef, fg, gh, hi, ib.

from this we find that f is the midpoint of ab.

so using mid point formula we find

f = (3,7)

similarly considering fb, we get

h = mid point of fb = ((6,6) and g, mid point of fh is

g = (9/2, 13/2)

i is mid point of hb

so i =(15/2,11/2)