1. Determine if line JK and line LM are parallel, perpendicular, or neither. J(1, 9), K(7, 4), L(8, 13), M(-2, 1) 2. Determine if line JK and line LM are parallel, perpendicular, or neither. J(13, -5), K(2, 6), L(-1, -5), M(-4, -2)

3. Determine if the lines are parallel, perpendicular, or neither. 10x + 5y = -5 and y = -2x + 6

4. Write the equation of the line in slope-intercept form with the given point and slope or two points. (-7, 13); slope = -2

5. Write a linear equation in slope-intercept form with the given information. Passes through (-6, -1) and is parallel to y = -2/3 x +1

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 ☺

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5

part a: 1.08

part b: 27.59