That is not possible to make a triangle with a right angle and a acute angle because a acute triangle only has acute angles and a right triangle has a obtuse angle in it
The extraneous solution is x=-1 and x=-6
Step-by-step explanation:
Given the question as;

Eliminate the root in the left hand side

solve the quadratic equation by factorization
Find multiples of 6 that add up to 7-------- 1*6
Rewrite the equation as;
x²+7x+6=0
x²+6x+x+6=0
x(x+6) +1 (x+6) =0
(x+1)(x+6) =0
x+1=0
x=-1
or
x+6=0
x=-6
The roots are, x=-1, and x=-6
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Quadratic equations : brainly.com/question/1332667
Keywords : extraneous, solution
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Answer: it would take 22 minutes and 30 seconds
Step-by-step explanation: 450 gallons / 20 gal.per.min
= 22.5