Answer:
Step-by-step explanation:
Her former rent is $ x
Twice the former rent: 2*x = 2x
$300 less than 2x: 2x - 300
2x - 300 = 550
Add 300 to both sides
2x - 300 + 300 = 550 + 300
2x = 850
Divide both sides by 2
2x/2 = 850/2
x = 425
Her former rent = $425
M4 would be choice b I know this because I put it in the calculator
Answer:
Solving the equation
for variable n we get 
Step-by-step explanation:
We need to solve the equation
for variable n
Solving:

Subtract both sides by 6p

Switch sides of equality

Divide both sides by 3

So, solving the equation
for variable n we get 
5(12.50 x 7) = 437.5
Explanation: you take the amount she makes for one hour (12.50), times it with the hours she works in a day (7), and then times it with how many days she works (5).
Answer: I think standard form is when you you write it in thousands
Step-by-step explanation: