HELP!!! 2 questions
1. Suppose a friend tells you she wants to buy a bicycle with a price of $3749.99, and you’d like to know the bicycle’s total price (the price after taxes) so that you can compare prices at in other counties.. Find the total price, p, of the bicycle if your friend bought the bicycle in a location where the rate is r. Assume r is the rate in decimal form.
2.Suppose a friend tells you she wants to buy a bicycle with a list price of $3749.99, and you’d like to know the bicycle’s total price (the price after taxes) so that you can compare prices at in other counties.. You are visiting Lincoln County where the tax rate is lower. You paid a total of $4049.99. What is the tax rate in Lincoln county, and how much did you save on what you would have to pay for the same bicycle in Pierce County where the tax is 10.3%?

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺