From the description, we have the function

Since the square root cannot be a negative number, the only thing need to do to find the domain of the function

is take the expression inside the square rot and set it greater or equal than zero:




or

We can conclude that we can use the inequality

to find the domain of

. Also, the domain of

is (∞,

]U(5,∞).
Answer:
A
Step-by-step explanation:
Multiply them according to the problem.

As you can see, the only terms in the two equations that can cancel out are
and
.
Answer: y=40x+100
Step-by-step explanation: it’s growing by 40 every week so x=number of weeks and 100 is the starting point so you always add that. Ex) week 3: 40(3)+100 = 120+100=220