Hello!
This question is an example of function composition.
Given, f(x) = 3x - 5, find f(x - 1). For this problem, we substitute x for (x - 1).
f(x - 1) = 3(x - 1) - 5
f(x - 1) = 3x - 3 - 5
f(x - 1) = 3x - 8
Therefore, the answer is choice D, f(x - 1) = 3x - 8.
The answer is -2.5. this is how you work it out.
21.4 + (-23.9) = -5/2 = -2.5
This one is A. Notice that every second the person moves 1.5 feet closer
Answer:
Step-by-step explanation:
Simplifying
2x(3 + 4a) = -16x + 6x
(3 * 2x + 4a * 2x) = -16x + 6x
Reorder the terms:
(8ax + 6x) = -16x + 6x
(8ax + 6x) = -16x + 6x
Combine like terms: -16x + 6x = -10x
8ax + 6x = -10x
Solving
8ax + 6x = -10x
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Add '-6x' to each side of the equation.
8ax + 6x + -6x = -10x + -6x
Combine like terms: 6x + -6x = 0
8ax + 0 = -10x + -6x
8ax = -10x + -6x
Combine like terms: -10x + -6x = -16x
8ax = -16x
Divide each side by '8x'.
a = -2
Simplifying
a = -2 <— answer
