KNOW Choose the letter of your answer. If your answer is not among the choices write
1. What is the GCF of 2x2 - 4x - 6x2 = 2x(x - 2 – 3x?)?
a) 2x b)(x - 2 - 3x2)
2. Which of the following is equivalent to 18x + 12y?
c)-4x
d)2x(x-2-3x)
a) 4(5x + 3y)b)2(95 + 8y) c)3(6x +5y) 46(3x + 2y)
3. Which of the following is equivalent to the equation x +5 = (x + 3)??
a)(x + 1)(x + 4) = 0 b)(x - 1)(x + 4) = 0 c)(x + 1)(x + 4) = 5 d)(x + 1)(x + 4) = 3
4. Which of the following is a quadratic expression with a > 1?
a)x2 + 3x - 5 b) - 32 - 2x - 1 c)3x2--2 d) 5x2 + 25
5. Which of the following is a quadratic expression where a =1?
a) 4x2 - 7x-8 b) x2 - 5x – 280
d) 9x? + x - 10
6. Factor x3 -8.
d)(3x - 5)(x + 1)
a)(x + 2)(x2 - 2x + 4) b)(x - 2)(x2 + 2x + 4)c)(x - 5)(3x + 1)
7. Factor x3 + 27 completely.
a)(x + 3)(x2 - 3x + 9) b)(x+3)(x2 – 3x + 18)
c) 4x2 - 9
c)(x + 3)(x2 – 3x - 9)d)(x + 5)(x-3)
8. Which of the following is a quadratic expression with a=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 ☺

i don't know

step-by-step explanation:

choose (5, 1.5) and (-1.5,-3.5)

step-by-step explanation:

5 - 1.5 =3.5

-1.5 - (-3.5) = 2

3.5 + 2 =5.5

hope this !

45.36 feet per second

step-by-step explanation:

tyrone travels 30 miles in 58.2 minutes.  

1 mile = 5280 feet; this means he travels

30(5280) = 158400 feet in 58.2 minutes.

1 minute = 60 seconds; this means he travels 158400 feet in

58.2(60) = 3492 seconds.

this gives us the unit rate of

158400/3492 = 45.36 feet per second.