For this case we have the following functions:

We must find the following sum of functions:
(f + g) (x)
By definition we have to:

So, we have to:

Answer:

Answer:
81-25k²
Step-by-step explanation:
We need to write the expression for "The quantity 81 minus 5k, squared".
Square of any number x is given by x².
Square of 5k is given by : (5k)²= 5²×k²=25k²
Now subtract 25k² from 81.
It means we get : 81-25k². It is required expression.
Answer:
$140
Step-by-step explanation:
2 diveded by 40 is 20. 20 multiplied by 7 is 140.
Answer:
In this equation, the value of x is equal to 6.
Step-by-step explanation:
We are given an algebraic equation in which we need to solve for x.
We can use several properties and algebraic methods to solve this equation.

Firstly, we want to use the distributive property to evaluate the first term in the equation: -6(x - 3).

By distributing the -6 through, we get -6x and positive 18. Then, we need to begin combining like terms. Let's start with our constants (or the terms without a variable).

Then, we can combine our terms with variables.

Now, we can use the subtraction property of equality which states that if we subtract a term from one side of an equation, we must also subtract it from the opposite side. Therefore, we want to get x by itself, so we can subtract 21 from both sides using the subtraction property of equality to do this.

Finally, we can use the division property of equality and divide both sides of the equation by -5 to isolate x.

Therefore, by solving the multi-step equation, we solved that x = 6.