HELP ASAP!! After school today, you spent h at practice and then a half hour in the library. It took 15 minutes to get home at 6:00 P. M. What time did you start practice?

Option C 3:30PM

Step-by-step explanation:

Time spent at practice=1 3/4hr=7/4hr

Time spent in Library=1/2hr=2/4hr

Time taken to reach home=15min=(15/60)hr=1/4hr

Total time spent in different activities=(7/4+2/4+1/4)hr

=10/4hr=5/2hr=2.5hr

The time you started practice=6:00PM-Total time spent in different activities

=6-2.5

=3.5

=3:30PM

a) 7x=7

step-by-step explanation:

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 ☺