X=7
You divide 14 by 2 to find the proportion (7) then multiply it by 1 to get the base length of the large triangle since they’re congruent.
My guess is -1 because when a x value don’t got a number replace it with a 1
The answer for the question is 21
You subtract 3 miles from the 5.5 miles which gives you 2.5
Ur answer is: -2a² + 7a + 1