Lets use 500 minutes and solve for each company:
Plan A = 15 +0.05(500) = 15 + 25 = 40
Plan B = 5 + 0.15(500) = 5 + 75 = 80
Plan C = 10 + 0.10(500) = 10 + 50 = 60
Plan D = 20 + 0.20(500) = 20 + 100 =120
Plan A is the most cost effective.
The amount of time required to travel a certain distance is equal to quotient of distance and speed. We let x be the speed of Terry and Mark's will be x+2. The equation that would best represent the scenario is,
15/x = 21/(x+2)
The value of x is 5. Thus, Mark's speed is 7 mph.
The slope can be calculated by subtracting the y values (the rises) and dividing the difference by the difference between the x values (the runs) to get rise over run. -1-4= -5 (differences in y's) & 5-(-2)= 7 (the differences in the x's). now divide the difference in the y' by the difference in the x's to get m= -5/7.
If there is only positive numbers it is positive if there is a positive and a negative it is a negative if it is a negative and a negative the slope will be positive if this helps mark brainiest
Answer:
10x+2
Step-by-step explanation:
creo que es esa no se si esta bien
