1. (-10x^3 + 30x -20) divided by (-5x+5)?
a)2x^2-2x+4****
b)-2x^2-2x-4
c)-2x^2+2x+4
d)2x^2+2x-4
2.The width, w, of a rectangular playground is x + 3. The area of the garden is x^3 - 7x + 6. What is an expression for the length of the playground?
a.) x^2 - 3x + 2 ***
b.) x^2 + 3x - 2
c.) x^2 + 3x + 2
d.) x^2 - 3x - 2
3.Katalin drove 180 miles on her vacation. She drove an average of 1.5 times faster on the second 90 miles of?
a)150/x****
b)300/x
c)150x
d)225/x
4.A catering company charges a $300.00 set up fee and $10.00 per person for a lunch buffet. Approximately how many people must attend the lunch so that the total cost per person is $14.00? (1 point)
• 75 people*****
• 30 people
• 214 people
• 440 people
5.Simplify x/6x-x^2
a)1/6-x ; where x=0.6
b) 1/6-x; where x=6***
c)1/6x; where x=0
d)1/6
6. 5x^3/7x^3+x^4
a)5/7+x; where x= 0,-7****
b)5/7+x; where x=-7
c)5/7x; where x=0
d)5/7
7.x-2/x^2+4x-12
a)1/6+x; where x=-6***
b)1/6+x; where x= -6, 2
c) 1/x+2; where x=-2
d) x+2
8. x^2+3x-4/x+4
a)1/x-4; where x= 4
b) x-4
c) x-1; where x=1****
d) x-1; where x=-4
9.3/5a*1/a^2
a)3/5a^2; where a = 0
b)3/5a^2
c)3/5a^3 where a=0****
d)4/5a^2 where a=0
10.x-5/4x+8*(12x^2+32x+16)
a)(3x+2)/4(x-5)***
b)(x-5)(3x+2)/4
c)(x-5)(3x+2)
d)(x-5)(12x+8)
11.(x^2-4/x-8)/x-2
a)(x-2)(x+2)/x-8
b)x-8/x+2
c)x-2/x-8
d)x+2/x-8***
12.x^2+2x+1/x-2/x^2-1/x^2-4
a)(x+1)(x+2)/x-1
b)(x-1)(x-2)/x+1
c)(x-1)(x+2)/x+1
d)(x+1)(x-2)/x-1***
13. (24w^10+8w^12)/(4w^4)
a)6w^6+2w^8***
b)6w^6+8w^12
c)24w^10+2w^8
d)6w^10+2w^12
14.(-5w^10+10w^8+5w^6)/(5w^5)
a) -w+5w^3+w
b)-5w^5+10w^8+w
c)-w^5+10w^8+5w^6
d)-w^5+2w^3+w***
15.-5x/x+3-7/x+3
a) -5x/x+3-7/x+3***
b)-5x-7/(x+3)
c)-5x-7/(x-3)^2
d)-5x+7(x+3)^2
16.-2/x+3-4/x-5
a)-6x-2/(x+3)(x-5)***
b)6(x-1)/(x+3)(x-5)
c)-6/(x+3)(x-5)
d)2/(x+3)(x-5)
17. 7/x-3+3/x-5
a)-10x-44/(x-3)(x-5)
b) 10x-44/(x-3)(x-5)***
c) 10x/(x-3)(x-5)
d) 10x+44/(x-3)(x-5)
18.-5/x-3 - -4/x+2
a)-1/(x-3)(x+2)
b)-x-22/(x-3)(x+2)****
c)-1/x-5
d) -22/ (x-3)(x+2)
19. 4/x+5/x=-3
a)x=27
b)x=3
c)x=13
d)x=-27
20. 1/3x-6- 5/x-2=12
a)34/9
b)-29/18
c)-34/9
d)29/18**
21. 4/x+12/x^2=5
a) x=6/5,2
b)x= -6/5, -2
c) x=6/5, -2
d) -6/5.2**
7 answers
Did you factor first??
You are on the right track : )
#2 correct
#3 don't understand the question
#4 correct
#5 assuming you meant x/(6x-x^2)
= x/(x(6-x))
= 1/(6-x), x ≠ 0,6 , not one of you choices
#6 5/(7+x) ; where x= 0,-7 . Those brackets are necessary.
#7 1/(6+x) ; where x=-6
#8 (x^2+3x-4)/(x+4) , brackets are essential
= (x+4)(x-1)/(x+4)
= x-1 , x ≠ -4
#9
3/5a*1/a^2 = 3/(5a^3)
#10
(x-5)/(4x+8)*(12x^2+32x+16)
=(x-5)/(4(x+2)) * 4(x+2)(3x+2)
= (x-5)(3x+2) or 3x^2 - 13x - 10
etc
7 answers