f(x) = 4*2ˣ = 2ˣ⁺²
The answer is B because it is an exponential function since x is an exponent. Also, decay mean decreasing and growth means increasing. The function 2ˣ⁺² is "growing" as x gets bigger because the base is not a fraction.
Area = length × width
45/4 = 9/2 × width
width = (45/4) ÷ (9/2)
= 5/2 feet
I believe it's around 50 miles.
Answer:
Option A
Step-by-step explanation:
Let's denote:
x is the number of albums Teresa downloads.
y is the number of individual songs Teresa downloads.
=> 9x + y = 25
Let's check:
Option A: x = 2 and y = 7 => 9 x (2) + 7 = 18 + 7 = 25 => valid
Option B: x = 1 and y = 8 => 9 x (1) + 8 = 9 + 8 = 17 => invalid
Option C: x = 4 and y = 5 => 9 x (4) + 5 = 36 + 5 = 41 => invalid
Option D: x = 3 and y = 6 => 9 x (3) + 6 = 27 + 6 = 33 => invalid
