Answer:
c = 7
Step-by-step explanation:
The sum means to add c and 9, that is
c + 9 = 16 ( subtract 9 from both sides )
c = 16 - 9 = 7
When H = -5 the parabola will go right.
400 ÷ 3 = 133 1/3
So the perimeter of the 3 sides will be 133 + 133 + 134, making it 400
Total area = 133 x 134 = 17822 square feet
So the dimension is 133 by 134 feet
Jeremy is incorrect because a negative plus a negative will always be a negative.
The equation represents two equivalent expressions [ similar sides ]
Hope this helps!