8 nickels, because 8 (nickels) × 5 (worth) = 40
24 dimes, because 8 × 3 = 24 24 × 10 = 240
240 + 40 = 280
Answer:
A
Step-by-step explanation:
B, C and D are all equations.
A is the only one that is not.
The answer is A.
Answer:
-22
Step-by-step explanation:
9-31=-22
Answer:
![y=41,8 . x + 12](https://tex.z-dn.net/?f=y%3D41%2C8%20.%20x%20%2B%2012)
Step-by-step explanation:
This problem is solved using the linear function formula:
![y=a.x+b](https://tex.z-dn.net/?f=y%3Da.x%2Bb)
Where:
y= total bill
x= number of hours worked
b=fee
We have to find "a" in order to have the complete equation. We know that the constant fee (b) is 12$, and that if the hours worked are of 2.5 the total bill is $95.75, so we supplant on the equation and isolate "a".
![95.75=a. 2,5 + 12](https://tex.z-dn.net/?f=95.75%3Da.%202%2C5%20%2B%2012)
![95.75-12=a. 2,5](https://tex.z-dn.net/?f=95.75-12%3Da.%202%2C5%20)
![95.75-12=a. 2,5](https://tex.z-dn.net/?f=95.75-12%3Da.%202%2C5%20)
![83.75=a. 2,5](https://tex.z-dn.net/?f=83.75%3Da.%202%2C5%20)
![83.75 : 2=a](https://tex.z-dn.net/?f=83.75%20%3A%202%3Da)
![83.75 : 2=a](https://tex.z-dn.net/?f=83.75%20%3A%202%3Da)
![41,8=a](https://tex.z-dn.net/?f=41%2C8%3Da)
So now we have the complete equation:
![y=41,8 . x + 12](https://tex.z-dn.net/?f=y%3D41%2C8%20.%20x%20%2B%2012)
If for every 2 to that get in 1 has to go out. keep the 2:1 ratio and make it equal 28:e. use cross multiplication to get that e=14