Answer:
949$
Step-by-step explanation:
You get 460$ the first year, then 488 in the second.
Answer:
If your not rounding then 9.45 is greater
Step-by-step explanation:
Answer:
y=9-7x
If x= -1, y=16
If x= 0, y=9
If x=2, y= -5
Step-by-step explanation:
Because you are solving the equation for y, you want to have y by itself on one side. The only way to do that in this problem is by subtracting the 7x on both sides.
y+7x=9
-7x -7x ---> y=9-7x
The next part of the question says to find the value of Y for each value of X. Using the given X values, we plug them into the equation we just got in order to find Y.
y=9-7(-1) ----> y=16
y=9-7(0) ----> y=9
y=9-7(2) ----> y=-5
Answer:
maximum height of the arrow will be 408 m
Step-by-step explanation:
We have given the function of height as ![h(t)=-16t^2+160t+8](https://tex.z-dn.net/?f=h%28t%29%3D-16t%5E2%2B160t%2B8)
We know that first derivative of height will be velocity
So first derivative of height
![\frac{dh}{dt}=-32t+160](https://tex.z-dn.net/?f=%5Cfrac%7Bdh%7D%7Bdt%7D%3D-32t%2B160)
![v(t)=-32t+160](https://tex.z-dn.net/?f=v%28t%29%3D-32t%2B160)
We know that at maximum height velocity will be zero
![-32t+160=0](https://tex.z-dn.net/?f=-32t%2B160%3D0)
t = 5 sec
Sp arrow will be at maximum height at t = 5 sec
So height at t = 5 sec will be
![h(5)=-16\times 5^2+160\times 5+8=408m](https://tex.z-dn.net/?f=h%285%29%3D-16%5Ctimes%205%5E2%2B160%5Ctimes%205%2B8%3D408m)
So maximum height of the arrow will be 408 m
Weight of copper = 1/2w and weight of zinc = 1/2 w
So:-
c = 0.5w*6 + 0.5w*3
c = 3w + 1.5w = 4.5w
this equation is the same as choice A