30 in an online game you are rewarded with 20 points each day you log on and 5 dollars. you are trying to raise 1,420 points. you have 100 points. how many days would it take to raise 1,420 points?

 66

Step-by-step explanation:

20 points per day is the rate, 100 points is the intial amount, and 1420 points is the total.

Use the formula: y = mx + b  

1420 = 20x + 100   plugged the values into the equation

1320 = 20x             subtracted 100 from both sides

   66 = x                 divided both sides by 20

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

5/12, or 5: 12

step-by-step explanation: