In a right triangle, the square of the hypotenuse equals the sum of the squares of the legs.
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C) Quick way:
3x^2+6x+6=0 ---> x^2+2x+2=0,
sum of solutions is the 'x' coefficient multiplied by -1: (-1+i)+(-1-i)=-2-->2
Product is the independent term: (-1+i)(=1+i) = (-1)^2-i^2 = 1+1=2
Takes longer to write it down!
45.5 is your answer, you will have to multiple the height times the base ( 5 x 9.1 )
This is the answer

or you can solve it like this

hope this helps
G> (that sign means greater than)6.4
In the options 7 is greater than 6.4, the others are either equal to or less than. So the answer is 7.