Answer: William
Step-by-step explanation: This is true because whichever has a better gas mileage pays less, so the bigger number per year has better mileage, so 15,000 would have better which is Donald, and William has 12,000 which is worse, so he would have to pay more.
Answer:
Hi,
Step-by-step explanation:
1) PC=PD since PC*PA=PD*PB
2)25 since PO²=PA²+r² PO=14.5, PB=14.5+10.5=25
3)
6²=3*x==> x=12
Answer:
a.-3
b. y=-3x-1
c. y=-3x-1
d. 3x+y=-1
Step-by-step explanation:
Collect like terms
(8xy + 13xy) + (12x - 6x)
Simplify
<u>21xy + 6x</u>
Set up the following equations:
![x + y = 40](https://tex.z-dn.net/?f=x%20%2B%20y%20%3D%2040)
![20x + 18y = 770](https://tex.z-dn.net/?f=20x%20%2B%2018y%20%3D%20770)
x is the amount of hours worked on the weekday job, and y is the amount of hours worked on the weekend job.
We'll use substitution to remove one of the variables.
Multiply the first equation by -18 to get opposite coefficients for y:
![-18x - 18y = -720 ](https://tex.z-dn.net/?f=-18x%20-%2018y%20%3D%20-720%0A)
![20x + 18y = 770](https://tex.z-dn.net/?f=20x%20%2B%2018y%20%3D%20770)
Combine these two equations together:
![2x = 50](https://tex.z-dn.net/?f=2x%20%3D%2050)
Divide both sides by 2 to get x by itself:
![x = 25](https://tex.z-dn.net/?f=x%20%3D%2025)
Plug in x to the first original equation:
![25 + y = 40](https://tex.z-dn.net/?f=25%20%2B%20y%20%3D%2040)
Subtract 25 from both sides to get y by itself:
![y = 15](https://tex.z-dn.net/?f=y%20%3D%2015)
He worked
25 hours at his weekday job, and 15 hours at his weekend job.