Answer:
Step-by-step explanation:
common difference d=3-1=2
first term a=1
an=a+(n-1)d
2n-1=1+(l-1)2
2n-1=1+2l-2
2n-1=2l-1
l=n
(i used l for number of terms)
number of terms=n

Step-by-step explanation:
(f-g)(x)=

It will be $15 dollars for 5 drinks
Expand (x+2)^2: x^2 + 4x + 4 : remember that (a+b)^2 = a^2 + 2ab + b^2
So: x^2 + 4x + 4 - x^2 = 60
Becca: in 1 hour;
(3(3/4) miles in 1/2 hour)2
=7.5 miles in 1 hour
Alice: in 1 hour;
(5(1/4) miles in 3/4 hours)
She travels 5(1/4)/3 = 1.75 miles in 1/4 hours.
Travels 1.75x4 = 7 miles in 1 hour
As seen, Becca runs faster, 0.5 miles per hour faster.
Hope I helped :)