Answer:
and
Step-by-step explanation:
Let
x -----> the number of polyphonic ringtones
y ----> the number of standard ringtones
we know that
-----> equation A
-----> equation B
Solve the system of equations by substitution
Substitute equation A in equation B and solve for y
Find the value of x
6 polyphonic, 1 standard
Neither
2,5,10,17
Differences between numbers:
2->5 (3)
5->10 (5)
10->17 (7)
There is no common difference between numbers so its neither.
a4 is 17 because that is the 4th term in the sequence.
g(f(X))=(x-3)^2-x-2
=x^2+9-6x-x-2
=x^2-7x+7
18,000,000 microorganisms
250,000 x 24 x 3
$1.50
39x - 11 = 17x + 6
Answer is A