Mathematics - 7 June 2007

I dont understand theses questions!!

7. x^2 + 7x + 9 = 0

8. x^2 + + 6x = 0

9. 15x^2 – 7x – 2 = 0

10. x2 – 9x + 5 = 0

2007-06-07 06:30:13 · 7 answers · asked by BOL3N$ HOODPiiNC3$$ 1

1/2(1-cos2x) dx

2007-06-07 06:29:27 · 5 answers · asked by Anonymous

A football field is to measure 50.3 meters by 100.6 meters. Workers laying the chalk lines must ensure that the corners of the field form right angles. Explain how they can use the Pythagorean therom to help them.

2007-06-07 06:24:25 · 8 answers · asked by Anonymous

Question 1 (Multiple Choice Worth 5.0 points)

x - 4 5

x 1

x 9

x 1

x 9

Question 2 (Multiple Choice Worth 5.0 points)

-x + 3 > 6

x>3

x<3

x>-3

x<-3

Question 3 (Multiple Choice Worth 5.0 points)

x + 3 4

x 1

x 7

x 1

x 7

Question 4 (True/False Worth 5.0 points)

Graphing the inequality x > 2/3 is not possible on a number line.

True
False

Question 5 (Multiple Choice Worth 5.0 points)

Mrs. Prehn has promised her two sons that they may go to the Green Day concert if together they save at least $45. The older son (Trent) agrees to save twice as much as the younger one (Bruno). What is the least amount that Trent must save?

$15

$20

$25

$30

Question 6 (True/False Worth 5.0 points)

Graphing the inequality x 1/2 is not possible on a number line.

True
False

Question 7 (Multiple Choice Worth 5.0 points)

Translate the following: The sum of three consecutive even integers is less than 25.

x + y + z < 25

1x + 2x + 3x < 25

x + (x+1) + (x+2) < 25

x + (x+2) + (x+4) < 25

Question 8 (Multiple Choice Worth 5.0 points)

Translate the following: The sum of three consecutive odd integers is less than 40.

x + y + z < 40

1x + 2x + 3x < 40

x + (x+1) + (x+2) < 40

x + (x+2) + (x+4) < 40

Question 9 (Multiple Choice Worth 5.0 points)

3 - M 5

M -2

M -2

M 2

M 2

Question 10 (Fill-In-The-Blank Worth 5.0 points)

Please enter your answer without spaces. For example, if your answer is "x is greater than 10," type x>10 in the blank.

h / 3 < 23, solve for h__________

Answer for Blank 1:

Question 11 (True/False Worth 5.0 points)

If -40a < -10, then a > 1/4

True
False

Question 12 (Multiple Choice Worth 5.0 points)

4 - H -10

H -14

H 14

H -14

H 14

Question 13 (True/False Worth 5.0 points)

When solving an inequality, it is only necessary to reverse the inequality sign when dividing by a negative number.

True
False

Question 14 (True/False Worth 2.0 points)

When solving an inequality, it is necessary to reverse the inequality sign when multiplying or dividing by a negative number.

True
False

Question 15 (Multiple Choice)

Choose all choices that apply if you were to graph the following inequality.

x<-2

open dot on -2

closed dot on -2

arrow to the left

arrow to the right

2007-06-07 06:22:01 · 3 answers · asked by kchief10 1

i need help with this quiestion.

Body surface area (BSA) is often used to calculate dosages for some drugs. BSA is calculated in square meters using a person's weight and height.

BSA = sqr: (weight in kg) x (hight in cm)/3600


Calculate the BSA for an adult whose height is 165 cm and weight is 62 kg. Round to the nearest hundredth, if necessary.

2007-06-07 06:18:52 · 7 answers · asked by Anonymous

I WILL VOTE FOR ANY ANSWERS GIVEN

2007-06-07 06:15:52 · 10 answers · asked by Anonymous

oo
∑ (n^-1)/(n^2 + 1)
n=1

oo
∑ n^4/(n^5 + 1)
n=1

possible responses....

a. Only the first series converges.

b. Only the second series converges.

c. Both series converge.

d. Both series diverge.

2007-06-07 06:09:42 · 4 answers · asked by Jake 1

i need help with this quiestion

$5700 is compounded semiannually at a rate of 5%. Find the total amount of compound interest earned at the end of 15 years. (The compound interest factor is 2.09757.)

2007-06-07 06:07:21 · 1 answers · asked by Anonymous

i realy need help please.
$7840 is compounded semiannually at a rate of 8%. Find the total amount of compound interest earned at the end of 5 years. (The compound interest factor is 1.48024.)

2007-06-07 06:03:04 · 4 answers · asked by Is 2

I am currently learning about matrices in school, and I've run into a bit of a road block: I know how to perform the operations with matrices and all (addition, multiplication, determinants etc...), but i have no idea about WHY a person would want use them!!

Okay, i do understand when a person would use the addition and subtraction of matrices, and why one would use multiplication of an integer with a matrix, and I also know that they can be used to solve systems of equations, but certain aspects about them really confuse like:

-What is the use of multiplying one matrix to another (i.e. you multiply them, you've got a new matrix, but what do those numbers mean to the user?)?

-What exactly does the determinant represent? (i know how it can be used, but what does the determinant tell you about the matrix?)

Sorry about the vagueness of the questions. Guess I can't exactly word them well, but I basically just want to know exactly how these things function (work-related issue)

2007-06-07 06:01:39 · 10 answers · asked by Eurypt 2

2007-06-07 06:00:40 · 6 answers · asked by kchief10 1

how do you do problems like
5sqrt8

and

where there is a small 3 on the end of the square root and a 27 inside

3sqaure root 18 + square root 2

2007-06-07 05:59:07 · 4 answers · asked by punksareassrappedprisoners 2

it is a quadratic equation please help

2007-06-07 05:57:22 · 4 answers · asked by Anonymous

2007-06-07 05:29:43 · 8 answers · asked by Barbara J 1

1) x/3+x2/5+3
2) x-5/4-x/6=2/3
3) 4y/9-2y+2/3=2
4) x+1/2-4/3=3x+5/10
5) 3x/2-5x/3=4x-2/8

2007-06-07 05:28:29 · 5 answers · asked by Amy M 5

2007-06-07 05:27:37 · 6 answers · asked by Anonymous

2007-06-07 05:24:09 · 3 answers · asked by Jacoby P 1

Use the definition of area to show that the area under the curve y=x3
over the interval [0, b] is b4/4
(in this equation [0, b] is b4/4 ; b have power of 4 and then it is dividing with 4)
so please solve this equation.

2007-06-07 05:07:34 · 2 answers · asked by zubair y 1

or is it one of the following other answers....


a. 3x + 4y - 36 = 0

b. 4x + 3y - 35 = 0

c. 4x - 3y - 23 = 0

d. 3x + 4y + 14 = 0

e. 4x + 3y + 15 = 0

f. 3x - 4y - 20 = 0

g 4x - 3y + 27 = 0

or none of these ?

2007-06-07 05:05:36 · 3 answers · asked by Olivia 4

2007-06-07 05:01:30 · 7 answers · asked by Anonymous

- x sqrt - 11x - 28 = 0

2007-06-07 04:49:30 · 3 answers · asked by Chamillitary22 1

In most businesses, increasing prices of products can negatively impact the number of customers. A bus company in a small town has an average number of riders of 800 per day. The bus company charges $2.25 for a ride. They conducted a survey of their customers and found that they will lose approximately 40 customers per day for each $.25 increase in fare.

2007-06-07 04:41:51 · 3 answers · asked by Anonymous

If you were the Sphere in Flatland, how would you convince the Square that there is another dimension?

2007-06-07 04:31:12 · 11 answers · asked by confused 3

i need some help with it?...do u have any websites or suggestions?

2007-06-07 04:27:07 · 2 answers · asked by Berry A 2

2007-06-07 04:22:57 · 3 answers · asked by Lindsey F 1

1.find 2 consecutive integers who's sum is 79.
2.find 3 who's sum is 69.
3. find 3 consecutive intergers in which four times the sum of the first two is the same as 6 times the third.
4.find 3 consecutive intergers in whitch 3 times the sum of the first two is 16 more then the third.
5.find 3 consecutive integers in which twice the first is 57 less then three times the third.
6. find two consecutive odd integers that have a sum of 512.
7.find three consecutive integers in which the sum of the 2nd and 3rd integers is 85 more than the first.

2007-06-07 04:18:36 · 3 answers · asked by Amy M 5

the perimeter of rectangle ABCD is not 30 inches or the area of rectangle ABCD is not 50 square inches.

a. p^ ~q
b. p v ~q
c. ~p ^ ~ q
d. ~ p v ~q

2007-06-07 04:17:02 · 1 answers · asked by HOPING 1

Thank you

2007-06-07 04:12:17 · 2 answers · asked by Anonymous

1) 0.00089
2)0.00000678
3)0.0642
4)3,240,222
5)41,950,000,000
6)612,000

2007-06-07 04:09:53 · 4 answers · asked by Amy M 5

2007-06-07 04:07:40 · 3 answers · asked by Olivia 4