Answer: 30×2n=C
Step-by-step explanation:
30$ is flat fee so no variable
2$ dollars per person so "n" (the number of people) is times 2
= the final cost (C)
Answer:
The cost of each notebook is $3 and the cost of each thumb drive is $14.
Step-by-step explanation:
In order to solve this question we will attribute variables to the notebook and thumb drive. The price of a notebook we will call "x" and the price of a thumb drive will be "y". We now can create equations that represents the total amount spent by each person on these items. To do that we need to take the amount of each item that was bought and multiply it by it's price.
For Troy:
4*x + 6*y = 96
For Lisa:
2*x + 4*y = 62
We now have a system of equations and we can solve them by isolate one of he variables in one of the equations and using that value on the other. Using the second equation we have:
2*x + 4*y = 62
4*y = 62 - 2*x
y = 15.5 - 0.5*x
Using this expression on the first equation:
4*x + 6*(15.5 - 0.5*x) = 96
4*x + 93 - 3*x = 96
x = 96 - 93 = 3
We can now find the value of y:
y = 15.5 - 0.5*(3) = 14
The cost of each notebook is $3 and the cost of each thumb drive is $14.
X is equal to 8
Y is equal to 19
Hey there!
So, first, you need to rearrange the second equation so y is in front.
x+y=10
Subtract x.
y=10-x
Plug that in for y.
2x+3(10-x)=45
2x+30-3x= 45
Subtract 30 on both sides.
-x= 15
Divide by -1 on both sides.
x=-15.
I hope this helps!
~kaikers
Answer:
6 meters
Step-by-step explanation:
The circumference of a circle can be found using:
![c=\pi d](https://tex.z-dn.net/?f=c%3D%5Cpi%20d)
We know that the circumference is 18.85, so we can substitute 18.85 in for c.
18.85=![\pi d](https://tex.z-dn.net/?f=%5Cpi%20d)
We are trying to find the diameter. In order to do this, we need to get d by itself. Since d is being multiplied by pi, divide both sides by pi. This will cancel out pi, and leave d by itself.
18.85/
=
d/
6.00014135456=d
Rounded to the nearest whole number
6=d
So, the diameter is 6 meters