Step-by-step explanation:
an = 2n^2 - 3 · Anonymous. -1, 5, 15, 29, 47, ... an = 2 n^2 - 3.
The vertex is exactly half way between directrix and focus. In this case the vertex is (8,-7)
(h,k)
P is the distance between the vertex and either the directrix or focus, in this case p = 1.
a = 1/(4p) or 1/(4*1) or 1/4
write the equation in vertex form
y = a(x-h)^2 + k
y = 1/4(x-8)^2 -7
Answer:
2.- 100
Step-by-step explanation 1:

↑ As we can see, the only common multiple between 4 and 25 that is given to is 100.
Step-by-step explanation 2:

↑ Another way of knowing the answer is by using a fraction solving method. As we can see, the denominator is once again 100.
Hope it helped,
BiologiaMagister
Positive numbers is the last one