The answer is 19.25, because when you ..
the answer is -2 because 21-23 is a negative number
I am assuming you wrote the problem wrong. Is it a^2?
A^2 -4A-21=0
(A-7)(A+3)=0
A=7 A=-3, ignore the negative number because it doesn't make sense if you plug in for a.
length=a+3=7+3=10
Width=7=a
In probability?
each arrow shows what % chance it is.
uhhh here’s a pic off google to help
it can be more than 2 arrows and as many times as you like.