D means common difference which is the last term minus second last term .
and u can use this formula only if there is a common difference.
Answer:

Step-by-step explanation:
Consider the given equation

Factor form of a parabola: It displays the x-intercepts.
.... (1)
where, a is a constant and, p and q are x-intercepts.
So, we need to find the factored form of the given equation.
Splinting the middle term we get


.... (2)
On comparing (1) and (2) we get

It means x-intercepts of the given parabola are 4 and 2.
Therefore, equivalent forms of the equation is y=(x-4)(x-2).
Answer:
4
Step-by-step explanation:
Each box is 1 larger than the earlier one, so the boxes are 1, 2, 3, 4, and 5.
4 + 5 is the width across the bottom
2 + 3 is the width across the top (not counting h)
9 - 5 = 4, so h = 4
Answer: The answer is (a) JD should also subtract the areas of eight hidden surfaces.
Step-by-step explanation: Given that the sculpture consists of five identical prisms and he says the surface area of the sculpture is 4 times the surface area of one prism. We are to choose which one of the given four options are correct.
Since JD is calculating the surface area of the sculpture, consisting of five prisms. So, there will be eight hidden surfaces of the five prisms which will not be in count. Hence, he must subtract the areas of those eight hidden surfaces.
Please see the attached figure for more understanding, where prism A has 1 hidden surface, B has 2 hidden surfaces, C has 2 hidden surfaces, D has 2 hidden surfaces and E has 1 hidden surface.
Thus, the correct option is (a).