Question

Can someone please help me with a few questions??
7. Find the range of the function f(x)=4x-1 for the domain {-1,0,1,2,3}
a.-5,-3,0,7,11
b.-5,-4,-3,-2,-1
c.-11,-7,-3,1,5
d.-5,-1,3,7,11

9. How many solutions does this system have?
x-2y=2
y=-2x+5

a. Infinitely many
b. None
c. two
d. one


and 10. Solve the system by either substitution or elimination?
3x-5y=21
2x+y=1

a.(2,-3)
b.(2,3)
c.(-2,-1_
d.(-2,1)

Answer 1

7. Domain = x values, range = y values.
Plug in those values for x and see what you get.

9. Solve this system of equations to find out. There may be an easier way, but I don't remember it.

10. As you have no variable that would cancel out easily, I would use substitution.

Answer 2

i think number 9 is 2 , because a solution is the variables to make a statement true.

Answer 3

nvm im not sure

Answer 4

Did you try to solve the system of equations?