Someone me with this math ! imma use 80

Step-by-step explanation:

3(x+1)=21

get the equation in parenthesis and multiply it by 3

3x+3=21

Now you subtract 3 from each side to leave 3x by itself

3x=18

now, divide 3 by each side to leave x by itself

x=6

(Hope this helps you)

chad should not have included the values (1, 2) and (3, 6) because that would mean he only had half a healing card.

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.