Catie used 28 beads on the 7 in. wire because when you divide 68÷17 you get 4 which means that she used 4 beads every 1 in. Then you multiply 4×7 because that's how much we need to figure out and you get 28.
The vertex of a parabola is where dy/dx = 0
So we can differentiate that to find a solution:

Substituting in x=-4 into the original equation we can determine the y coordinate:
y = -(-4)^2-8(-4)-11 = -16+32-11 = 5
So we now know the coordinates of the vertex are
(-4, 5)
There are lots of ways to work out the concavity of the parabola (i.e. which way it opens), and by default you can work this out because a -x^2 graph always opens downwards, however to prove this you can differentiate it again to work out the rate of change of gradient:

This shows the rate of change of gradient to be negative, i.e. the gradient is getting continuously more negative, which proves the parabola opens downwards.
You can also do this by plugging numbers around the vertex into the equation or the differential to work out the gradient.
So to summarise,
the vertex is at (-4,5) and opens downwards.
Your answer would be c because he lifted 12 then you would have to proportionately add in the ten pounds to each box lifted.
Answer:
Plans must offer dental coverage for children. Dental benefits for adults are optional. Some of these include drug coverage, pregnancy and childbirth, mental health services, and more. So consider.
Answer: y > 50 years.
Step-by-step explanation:
Let's describe how to use the inequality symbols.
a < b (a is smaller than b)
a > b (a is larger than b)
a ≤ b (a is smaller than or equal to b)
a ≥ b (a is larger than or equal to b)
In this case, y represents your age, and you need to be more than 50 years old to receive a discount.
Then we must have "y is larger than 50 years"
This is written as:
y > 50 years.