Answer:
I can help what is your question
Let's factor the trinomial.
x^2+19x+84.
Find two numbers that add to 19 and multiply to 84.
They happen to be 7 and 12.
x^2+7x+12x+84
x(x+7)+12(x+7)
Gather like terms.
(x+7)(x+12)
Therefore, the answer is D.
Answer: 10 chairs
Step-by-step explanation:
The circular stage will be treated as a circle.
The 78.5 feet surrounds the circle so this is the circumference.
You need to find the diameter because that is the distance across the circle.
Circumference = π * diameter
Diameter = Circumference / π
= 78.5 / 3.14
= 25 feet
The distance across the circle is 25 ft, the number of chairs that can fit is therefore:
= Distance / Width of chair
= 25 / 2.5
= 10 chairs
The answer for x should be 12
solve for "a", to get the coefficient, and then plug it back in the equation.