$350= $130+$20x, x= amount of weeks
$350-$130=$220 $20*11=220
Answer: 11 weeks
Answer:
They sold 120 milkshakes that day
Step-by-step explanation:
We can set up a proportion


Note: If you have some value,
, and it is
of the total amount, you can find the value by doing the equation 
Answer:
D
x is less than or equal to -3
Step-by-step explanation:
I hope I was fast enough ^^
Answer:
(x - 7) • (5x - 7)
Step-by-step explanation: