Answer:
Linear equation for the monthly cost of the cell plan is 
Step-by-step explanation:
Let u denotes a flat monthly fee and v denotes amount charged per minute.
As the monthly cost is $71.50 if a customer uses 410 minutes,
(i)
As the monthly cost is $118 if a customer uses 720 minutes,
(ii)
Subtract (i) from (ii)

Put
in (i)

As x denotes the number of monthly minutes used,
linear equation for the monthly cost of the cell plan is 
Well, 60(sec.) divided by 4 = 15. 15x3= 45 seconds is Daniel's time.
60 divided by 12 = 5. 5x5 = 25 seconds is Jacob's time. Jacob finished faster. Hope this helps!
Answer:
20 cm² & 80 cm²
Step-by-step explanation:
Ratio of areas = (ratio of sides)²
Ratio of sides: 2/4 = ½
Ratio of areas: (½)² = ¼
Areas are:
⅕(100) = 20
⅘(100) = 80
See the attached graphic.
X is negative and Y is positive so it is Quadrant 2 (or Quadrant II)