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Answer:
A) y = 8.63 x
B) $224.38
Step-by-step explanation:
The the average monthly cost = (147.98+152.17+165.63)/3 = $155.26
So, For 18 employees the average monthly cost = $155.26
Let the equation that can be used to estimate y, the average monthly cost, in dollars, to buy lunch for x employees. ⇒ y = mx
For x = 18 , y = $155.26
So, m = y/x = $155.26/18 ≈ $8.63
∴ y = 8.63 x
To find the total cost for 26 employees.
∴ x = 26
∴ y = 8.63 * 26 = 224.38
The total cost of a monthly lunch for 26 employees = $224.38
All of the equations have a graph that is reflected over the x axis. So look at the maximum point/ the vertex of the graph.
1) has vertex (3,4)
2)has vertex (-3,4)
3)has vertex (4,3)
4)has vertex(-4,3)
The functions should look the same, the only difference is the vertex.
Answer:
![6x^2+ 5x](https://tex.z-dn.net/?f=6x%5E2%2B%205x)
![-x^2 +5x](https://tex.z-dn.net/?f=-x%5E2%20%2B5x)
Step-by-step explanation:
Expression is a polynomial when it contains variables, numbers and operators. Expression that contains fractional exponent is not a polynomial. Expression with variable in the denominator is not a polynomial.
![6x^2+ 5x](https://tex.z-dn.net/?f=6x%5E2%2B%205x)
It is a polynomial
![-7x^2+ \frac{5}{3x}](https://tex.z-dn.net/?f=-7x%5E2%2B%20%5Cfrac%7B5%7D%7B3x%7D)
It is not a polynomial because x is in the denominator
![-x^2 +5x](https://tex.z-dn.net/?f=-x%5E2%20%2B5x)
It is a polynomial
![x^2+5x ^ \frac{1}{5}](https://tex.z-dn.net/?f=x%5E2%2B5x%20%5E%20%5Cfrac%7B1%7D%7B5%7D)
It is not a polynomial because it has fractional exponent
18 - 2(h) = x
He has 18 gallons to start with. Then he loses 2 gallons every hour he is driving. So you would times the two and subtract it from what he has.