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
Answer:
-4x - 20x
Step-by-step explanation:
Multiply 2 by -10
79% = 0.79= 79/100
(not sure if this is what you meant?)
In interval <a, b> the average rate of change the function you count from this formula:

Here you've got a=-1 and b=1: