What is the most efficient first step to isolate the variable term on one side of this equation? -9x = -4x + 5 a. subtract 5 from both sides. b. add 5 to both sides. c. subtract 9x from both sides. d. add 4x to both sides.

For this case we have the following equation:

We want to clear x:

For this we must follow a series of steps, the first consists of adding 4x to both sides of the equation to obtain:

In this way, the variable term remains on one side of the equation.

Thus, the first step will be:

Add 4x to both sides

Option D

Answer

D. Add 4x to both sides.

Explanation

-9x = -4x + 5

On the right hand side we have -4x. We have to add 4x on both sides to have;

-9x + 4x= -4x + 5 + 4x          

(-4x + 4x = 0)

(-9x + 4x = -5x)

∴ -5x = 5

step-by-step explanation:

from the graph attached below:

domain of graph is the value of x for which the given function profit function p(x) is defined.

(a) the domain represents the number of years for which the outlet will earn a profit.

range of profit function defines the lowest to highest value of profit earned.

(b) the range of this function is (0 , 160 ). for this function, the range represents the outlet's profit earned.

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13