Mathematics - 20 August 2007

Question 1 text Question 1 1 points Save
Factor the polynomial completely. If the polynomial cannot be factored, write prime.

9k3m - 30k2m2 + 25km3
Question 1 answers
(9k2m + km)(k + 25m2)
km(3k + 5m)2
km(3k- 5m)(3k + 5m)
km(3k - 5m)2

Question 2 text Question 2 1 points Save
Factor the polynomial completely. If the polynomial cannot be factored, write prime.

6x2y2 - 13xy2 + 6y2
Question 2 answers
y2(x - 3)(6x - 2)
y2(2x - 3)(3x - 2)
(3x - 3y)(2x - 2y)
(2x - 3y)(3x - 2y)

Question 3 text Question 3 1 points Save
Factor the polynomial completely. If the polynomial cannot be factored, write prime.

z2 - 4z + 4
Question 3 answers
(z - 2)(z + 2)
(z - 2)2
(z + 2)2
(z - 4)(z + 4)

Question 4 text Question 4 1 points Save
Find a positive value of the given variable so that the trinomial is factorable.

13z2 + bz + 1; b = ?
Question 4 answers
14
12
15
13

Question 5 text Question 5 1 points Save
Factor the polynomial completely. If the polynomial cannot be factored, write prime.

x2 - 15x + 225
Question 5 answers
(x + 15)2
(x + 15)(x - 15)
(x - 15)2
prime

Question 6 text Question 6 1 points Save
Factor the polynomial completely. If the polynomial cannot be factored, write prime.

x2 + 15xy + 56y2
Question 6 answers
(x - 7y)(x + 8y)
(x - 7y)(x + y)
(x + 7y)(x + 8y)
prime

Question 7 text Question 7 1 points Save
Factor the polynomial completely. If the polynomial cannot be factored, write prime.

5x6 - 50x5 + 45x4
Question 7 answers
x4(x - 1)(5x - 45)
x4(5x - 5)(x - 9)
5x4(x2 - 10x + 9)
5x4(x - 1)(x - 9)

Question 8 text Question 8 1 points Save
Find a positive value of the given variable so that the trinomial is factorable.

x2 + bx - 5; b = ?
Question 8 answers
6
4
5
7

Question 9 text Question 9 1 points Save
Factor the polynomial completely. If the polynomial cannot be factored, write prime.

4x2 - 24x + 32
Question 9 answers
4(x - 8)(x + 1)
4(x - 2)(x - 4)
(x - 2)(4x - 16)
prime

Question 10 text Question 10 1 points Save
Write the perimeter of the rectangle as a simplified polynomial. Then factor this polynomial completely.

54x2

6x3 + 120x
Question 10 answers
12(x2 + 4)(x + 5)
6x(x + 20)(x + 9)
12x(x + 4)(x + 5)
6x2(x + 4)(x + 5)

2007-08-20 17:13:29 · 2 answers · asked by Anonymous

Find the first and second derivative of the equations

1) f(x) = x |x + 2|
2) f(x) = 12x^(2/3) - 4x

2007-08-20 17:10:01 · 2 answers · asked by DeadOn 1

2007-08-20 17:06:41 · 8 answers · asked by shawna 2

14-[-3(y-4)+9]=[4(2y+3)-6]+4

2007-08-20 16:56:38 · 5 answers · asked by ? 2

(3a^3b^5)(50a^2b^3)

(14z^3-28)/7z

please explain both thanks

2007-08-20 16:45:35 · 4 answers · asked by bonmacdurr 1

whats the absolute value?

2007-08-20 16:21:09 · 9 answers · asked by lang1323 2

Question 1 2 points Save
Determine whether the terms are like or unlike.

2m, 10m, -5m
Question 1 answers
like
unlike

Question 2 text Question 2 2 points Save
Solve the equation.

6x - 11x = 26 - 11
Question 2 answers
5
3
-3
-5

Question 3 text Question 3 2 points Save
Write the following as an equation, using x for the unknown number. Then solve.

Three-fourths of a number is . Find the number in lowest terms.
Question 3 answers
x = ;
+ x = ;
x = ;
x = ;

Question 4 text Question 4 2 points Save
Solve the equation.

= 9
Question 4 answers
11
27
12
3

Question 5 text Question 5 2 points Save
Identify the numerical coefficient of the term.

-13y5x6
Question 5 answers
-13, 5, 6
5, 6
13
-13

Question 6 text Question 6 2 points Save
Solve the equation.

b + 12 = 19
Question 6 answers
-7
-31
7
31

Question 7 text Question 7 2 points Save
Solve the equation. Don't forget to first simplify each side of the equation, if possible.

3(2z - 3) = 5(z + 2)
Question 7 answers
4
1
-1
19

Question 8 text Question 8 2 points Save
Solve the equation. Don't forget to first simplify each side of the equation, if possible.

10y = 3y + 3 + 6y
Question 8 answers
-3
-30
3
30

Question 9 text Question 9 2 points Save
Solve the equation.

5(2z - 5) = 9(z + 3)
Question 9 answers
2
-2
7
52

Question 10 text Question 10 2 points Save
Solve the equation. Don't forget to first simplify each side of the equation, if possible.

-7b + 4 + 5b = -3b + 9
Question 10 answers
9
-4
5
-9

Question 11 text Question 11 2 points Save
Solve the equation.

(6x - 9) = 6(x - ) + 9
Question 11 answers
0

all real numbers
no solution

Question 12 text Question 12 2 points Save
Simplify the expression. First use the distributive property to remove any parentheses.

-7(3n + 8)
Question 12 answers
-77n
-21n - 56
-4n + 1
-21n + 8

Question 13 text Question 13 2 points Save
Solve the equation.

3x + x = 15 - 3
Question 13 answers
-4
-3
4
3

Question 14 text Question 14 2 points Save
Write the following as an algebraic expression. Simplify if possible.

Add 7x - 12 to 4x - 4
Question 14 answers
3x - 16
11x + 8
11x - 16
11x + 16

Question 15 text Question 15 2 points Save
Solve the equation. Don't forget to first simplify each side of the equation, if possible.

5x - 4x + 2 = 2
Question 15 answers
2
-2
4
0

Question 16 text Question 16 2 points Save
Solve the equation.

k =
Question 16 answers
1
15
16
4

Question 17 text Question 17 2 points Save
Solve the equation.

-3x - 8x = 108 - 9
Question 17 answers
-11
-9
11
9

Question 18 text Question 18 2 points Save
Solve the problem by combining like terms.

To convert from meters to centimeters, we multiply by 100. For example, the number of centimeters in 3 meters is If one piece of string has a length of meters, and another piece of string has a length of centimeters, express their total length in centimeters as an algebraic expression.
Question 18 answers
(108x - 894) cm
(900x - 300) cm
(9x - 3) cm
(801x + 591) cm

Question 19 text Question 19 2 points Save
Solve the equation.

-0.07y + 0.14(100 - y) = 0.04y
Question 19 answers
56
112
3.5
35

Question 20 text Question 20 2 points Save
Solve the equation.

= 3
Question 20 answers
6
12
0
7

Question 21 text Question 21 2 points Save
Solve the equation.

-10.1q + 1 = -95.8 - 1.3q
Question 21 answers
11
9.7
-106
9.6

Question 22 text Question 22 2 points Save
Simplify the expression. First use the distributive property to remove any parentheses.

-6(8r + 3) + 10(10r + 3)
Question 22 answers
52r + 3
2r - 3
-66r
52r + 12

Question 23 text Question 23 2 points Save
Identify the numerical coefficient of the term.

-8x
Question 23 answers
8
1
0
-8

Question 24 text Question 24 2 points Save
Solve the equation.

-y = 7
Question 24 answers
7
-1
-7
0

Question 25 text Question 25 2 points Save
Solve the equation.

8x + 6(-2x - 2) = -10 - 6x
Question 25 answers

- 1
- 11
1

Question 26 text Question 26 2 points Save
Substitute the given values into the formula and solve for the unknown variable.

d = rt; t = 4, d = 12
Question 26 answers
0.3
8
16
3

Question 27 text Question 27 2 points Save
Solve.

9% of students at a university attended a lecture. If 5000 students are enrolled at the university, about how many students attended the lecture?
Question 27 answers
45,000 students
450 students
4500 students
45 students

Question 28 text Question 28 2 points Save
Substitute the given values into the formula and solve for the unknown variable.

P = 2L + 2W; P = 30, W = 6
Question 28 answers
24
9
15
12

Question 29 text Question 29 2 points Save
Solve.

How much pure acid should be mixed with 3 gallons of a 50% acid solution in order to get an 80% acid solution?
Question 29 answers
7.5 gal
4.5 gal
12 gal
1.5 gal

Question 30 text Question 30 2 points Save
Solve the formula for the specified variable.

V = Bh for h
Question 30 answers
h =
h =
h =
h =

Question 31 text Question 31 2 points Save
Graph the set of numbers given in interval notation. Then write an inequality statement in x describing the numbers graphed.

(-3, )
Question 31 answers


x -3


x -3


x > -3


x < -3

Question 32 text Question 32 2 points Save
Solve.

Kevin invested part of his $10,000 bonus in a certificate of deposit that paid 6% annual simple interest, and the remainder in a mutual fund that paid 11% annual simple interest. If his total interest for that year was $900, how much did Kevin invest in the mutual fund?
Question 32 answers
$4000
$7000
$5000
$6000

Question 33 text Question 33 2 points Save
Solve the inequality. Graph the solution set and write it in interval notation.

-20x - 8 -4(4x - 2)
Question 33 answers
(-4, )
[-4, )
(-, -4]
(-, -4)

Question 34 text Question 34 2 points Save
Solve.

Jeans are on sale at the local department store for 20% off. If the jeans originally cost $60, find the sale price. (Round to the nearest cent.)
Question 34 answers
$58.80
$12.00
$72.00
$48.00

Question 35 text Question 35 2 points Save
Solve the inequality. Graph the solution set and write it in interval notation.

-9x - 3 > -10x + 2
Question 35 answers
(-, -1 ]
(5 , )
[-1 , )
(-, 5)

Question 36 text Question 36 2 points Save
Solve.

Linda and Dave leave simultaneously from the same starting point biking in opposite directions. Linda bikes at 6 miles per hour and Dave bikes at 10 miles per hour. How long will it be until they are 20 miles apart from each other?
Question 36 answers
5 hrs
hrs
1 hrs
hrs

Question 37 text Question 37 2 points Save
Solve.

Mary and her brother John collect foreign coins. Mary has three times the number of coins that John has. Together they have 140 foreign coins. Find how many coins Mary has.
Question 37 answers
21 coins
35 coins
98 coins
105 coins

Question 38 text Question 38 2 points Save
Solve.

Six times a number, added to -63, is -105. Find the number.
Question 38 answers
-42
-252
-7
7

Question 39 text Question 39 2 points Save
Solve the inequality. Graph the solution set and write it in interval notation.

14x - 6 2(6x - 11)
Question 39 answers
(-, -8]
(-, -8)
[-8, )
(-8, )

Question 40 text Question 40 2 points Save
Solve the inequality. Graph the solution set and write it in interval notation.

35x + 30 > 5(6x + 7)
Question 40 answers
[1, )
(-, 1)
(1, )
(-, 1]

Question 41 text Question 41 2 points Save
Graph the inequality on a number line. Then write the solution in interval notation.

-4 < x < 0
Question 41 answers


[-4, 0)


(-4, 0)


[-4, 0]


(-4, 0]

Question 42 text Question 42 2 points Save
Solve.

Attendance this year at the homecoming football game is 174% of what it was last year. If last year's homecoming football game attendance was 33,000, what is this year's attendance? (Round to the nearest integer, if necessary.)
Question 42 answers
574,200 people
57,420 people
190 people
5273 people

Question 43 text Question 43 2 points Save
Solve.

A chemist needs 130 milliliters of a 75% solution but has only 43% and 95% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
Question 43 answers
70 ml of 43%; 60 ml of 95%
60 ml of 43%; 70 ml of 95%
80 ml of 43%; 50 ml of 95%
50 ml of 43%; 80 ml of 95%

Question 44 text Question 44 2 points Save
Solve.

A chemist needs 70 milliliters of a 69% solution but has only 60% and 81% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
Question 44 answers
40 ml of 60%; 30 ml of 81%
30 ml of 60%; 40 ml of 81%
50 ml of 60%; 20 ml of 81%
20 ml of 60%; 50 ml of 81%

Question 45 text Question 45 2 points Save
Substitute the given values into the formula and solve for the unknown variable.

V = Bh; V = 63, h = 7
Question 45 answers
70
27
441
9

Question 46 text Question 46 2 points Save
Graph the set of numbers given in interval notation. Then write an inequality statement in x describing the numbers graphed.

[-3, )
Question 46 answers


x -3


x < -3


x -3


x > -3

Question 47 text Question 47 2 points Save
Solve.

Jeans are on sale at the local department store for 30% off. If the jeans originally cost $57, find the sale price. (Round to the nearest cent.)
Question 47 answers
$39.90
$55.29
$74.10
$17.10

Question 48 text Question 48 2 points Save
Solve.

The difference of triple a number and is equal to the sum of the number and . Find the number.
Question 48 answers

-



Question 49 text Question 49 2 points Save
Substitute the given values into the formula and solve for the unknown variable.

V = Bh; V = 12, h = 2
Question 49 answers
18
24
6
14

Question 50 text Question 50 2 points Save
Solve.

Kevin invested part of his $10,000 bonus in a certificate of deposit that paid 6% annual simple interest, and the remainder in a mutual fund that paid 11% annual simple interest. If his total interest for that year was $700, how much did Kevin invest in the mutual fund?
Question 50 answers
$8000
$1000
$2000
$3000

2007-08-20 16:13:35 · 4 answers · asked by Paris W 1

for absolute value, is x=6 the right answer

2007-08-20 16:11:24 · 10 answers · asked by lang1323 2

its pythagorean theorem ....

State an equation you could use to find the unknown side length in each right triangle.Then find the unknown length.

bare with me ppl : its a triangle the height part is 10 yd and the hypothesis side is 26 yd so what would the base be ???

im like too tired to think rit now so plzz
im confused sorry but can u help!!!

2007-08-20 16:03:34 · 4 answers · asked by Anonymous

you travel 60 kilometers in 1.5 hours. What is your average speed?

2007-08-20 16:00:56 · 5 answers · asked by godschild 5

2007-08-20 15:52:09 · 6 answers · asked by StarDream 1

i just need to know how to integrate when sin, cos etc have a value before the x......

2007-08-20 15:49:14 · 2 answers · asked by ? 1

simplify

(4x+5)^2?? please explain

6x^2-(8x-9x^2)=2x-3x^2

(4m^3-2m+1)-(5m^3+4m+6)

2007-08-20 15:42:20 · 11 answers · asked by Lori 1

2007-08-20 15:35:16 · 6 answers · asked by Anonymous

if each exp is independent of all the other exp. what is the prob of the outcome A will occur at least once?

2007-08-20 15:24:23 · 2 answers · asked by Anonymous

is the answer -108 or positive 108?

2007-08-20 15:11:55 · 7 answers · asked by Anonymous

I need to know how to find the x-intercept for the parabola y=x^2-5x+3.

2007-08-20 14:57:25 · 2 answers · asked by Connie 2

I came up with the answer 42ft

2007-08-20 14:27:06 · 8 answers · asked by Anonymous

2007-08-20 14:08:47 · 35 answers · asked by nightowl 2

2x-3y = -7
4x -y = -14

what I keep on getting is no solution. when I do substitution it gives me -14 = -14.

i also get no solution for the following:

5x+2y= -3
15x+6y = 15

2007-08-20 13:59:12 · 6 answers · asked by Anonymous

16: 49x2 + 36 = 84x
-6/7, 0
6/7
-7, -6


17: 25x2 - 10x + 1 = 0
-5, 1
1, 5
1/5


18: 12x2 + 2x - 4 = 0
1/2, 0
-2/3, 1/2
2/3, 1/2, 0


19: (a + b)2 + 20(a + b) + 100 = 0
a + b = _______

-10
10
-10, 10


20: 25(a + b)2 - 10(a + b) = -1
a + b = ______

5
1/5
5, 1/5

2007-08-20 13:54:42 · 4 answers · asked by kitara 1

Specifically: x^2 + y^2 = 4
And: x^2 + y^2 - 4x - 4y = -4

2007-08-20 13:52:07 · 9 answers · asked by bubblebobboy 1

11: x2 + 15x + 54 = 0
6, 9
-6, -9
-54


12: x2 - 13x + 30 = 0
-5, 6
3, 10
-3, -10


13: x2 - 22x = -120
-10, 22
-10, -12
10, 12


14: 64x2 - 144x + 81 = 0
9/8
8/9, 0
8/9, 9/8


15: 9x2 + 48x + 64 = 0
-8/3
8/3
-3/8

2007-08-20 13:47:34 · 2 answers · asked by kitara 1

6: x2 - 8x + 6x = 48
0, 6
-8, 6
-6, 8


7: 10x2 + 16x - 55x - 88 = 0
11/2, -8/5
-11/2, 8/5
-2/11, 5/8


8: x2 + x - 3x = 3
-3, 1
-1, 3
3


9: x2 - 23x + 132 = 0
11, 12
-11, -12
-12


10: x2 - 24x = -144
144
-12, 12
12

2007-08-20 13:43:56 · 3 answers · asked by kitara 1

Hi. I need a solution to this problem. I am currently on the section in my maths book called Volume . There is a question and i do not know the answer. The shape is a Trapezoidal Prism, hence the title. There are four measurements: 7cm, 3cm, 9 cm and 4 cm. I have read the answer and it says that it is V=148.5 cm3. It's very strange because i know that the formula for a Trapezium is 1/2(a+b)x h, and there is 4 measurements. Also why is the answer in cubic centimetres. I need to know the steps on how to work it out etc.

Here is a picture of it: http://img208.imageshack.us/img208/4513/...

Also i need help on the volume of a Cylinder. The length is 1.1m and the constant area of cross section is 90cm. The answer is 0.70cm3. Could someone also explain steps on how to work it out. Also why is the answer in cubic centimetres?

Here is a picture of it: http://img62.imageshack.us/my.php?image=...
All comments are much appreciated. Thank You.

2007-08-20 13:39:14 · 3 answers · asked by Jay Garrick 1

y=mx+b

2007-08-20 13:33:48 · 4 answers · asked by Anonymous

2007-08-20 13:29:23 · 4 answers · asked by savspringer 1

MATH .......integers

2007-08-20 13:21:55 · 8 answers · asked by Allison L 1

Perform the indicated operations: 2√[48] + 7√[12] –√[27]

2007-08-20 13:18:27 · 3 answers · asked by wendiemail 1

Ok I have no idea how to figure out the inverse of this 2x2 matrix:

9 4
5 2

im likee 15 so i really dont understand a lot of places on the internet that talk about inverses of matrices... actually all ive ever done is adding subtracting and multiplying them so can somebody explain to me how to do this ?
thanks :]

2007-08-20 13:11:54 · 2 answers · asked by Anonymous