What are the domain and range of the function f(x)=square root of x-7+9

Domain:

Range:

Step-by-step explanation:

We have been given a function . We are asked to find the domain and range of our given function.

We know that a square root function is not defined for negative numbers, so domain of our given function would be .

Therefore, the domain of our given function is all values of x greater than or equal to 7 that is .

We know that range of a radical function of form is .

Upon looking at our given function, we can see that value of k is 9, therefore, the range of our given function is all values of y greater than or equal to 9 that is .

(0,-3) see attached graph

step-by-step explanation:

a. to solve the system, graph the two equations.

x = y+3 becomes y=x-3 has m=1/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move up 1 unit and 1 unit to the right. plot a point and connect.

y=-4x+3 has m =-4/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move down four units and to the right 1 unit. plot a point and connect.

the solution is the point (x,y) where the two lines intersect. by the graph below it is (0,-3).

b. to solve by substitution, substitute y = -4x-3 into x= y+3

x= (-4x-3) +3

x=-4x

5x=0

x=0

now substitute x = 0 back in to find y.

y= -4(0)-3

y=0-3

y=-3

solution is (0,-3)

c. use elimination by adding the equations together.

x-y=3

4x+y=-3

5x=0

x=0

then substitute into one equation to find y.

y=-4(0)-3

y=-3