Answer:
$42
Step-by-step explanation:
138/23 = $6 per kg
6*7 = 42
Answer:
first one
Step-by-step explanation:
move (n)x to the other side of the equation and then divide by n)y and then you have your equation and then find the graph that matches them
Answer:
$2.40
Step-by-step explanation:
If we know it is $1.08 to make 18 copies. We can do the math to find the rate of 1 copy. This would be by doing 1.08/18=0.06. So, it costs $0.06 to make 1 copy. Now, multiply that by 40 copies 0.06x40=2.40. The cost of 40 copies is $2.40.
Answer:
Graph of f(x+4) has been shown in the attached file.
Step-by-step explanation:
We have been given that 
On substituting x = x+4, we get

Now, we know that the parent function
represents a parabola whose vertex is at (0,0).
When we add any constant c in x then the parent function shifts c units left.
Since, we have added 4 in x, hence the graph of the given function will shift 4 units left. Thus, the vertex of the new parabola will be (-4,0)
Graph of f(x+4) has been shown in the attached file.