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1) X= 9 because you add the three sides then subtract 60 by that number

2)X=15 solve this the same way as number 1

3)X= 44 same as question 1 and 2

4) Add up the numbers 39 +72+89 then subtract 251 by the number you get when adding the three numbers

5) when you add the three side lengths 90ft, 110ft, and 100ft you will get 300ft done so if her friend added 80 to the fourth and final side she would have more than a total of 360ft. so Heather is incorrect.

6) you add the three measures 227, 381,and 294 then subtract 1221 by the sum of the three measures added together which should get you 319 for the other side length.

answer: can and shows the work

step-by-step explanation:

57 732

step-by-step explanation:

i dont really.know