10, 8, 6, 4...
What is a20 in this arithmetic sequence?
A) -32
B) -30
C) -28
D) -26
E) -24
A hair salon charges a fixed rate of $25.00 for a haircut and then an additional $15 for any other services. Write a function to model the cost of services there and then determine how many services you had if you were charged $115
A) f(x) = 15x + 25; f(6) = 115
B) f(x) = 25x + 15; f(6) = 165
C) f(x) = 15x + 25; f(6) = 125
D) f(x) = 15x + 25; f(115) = 1750
E) f(x) = 25x + 15; f(115) = 2890
We can see that it goes down by 2 each time.
We can write an equation.
-2x+12 is the equation where x is the place of the number (so if x = 1, then it will be the 1st number)
Then -2(20)+12 = -28, or answer C