# Posts by Lina

Total # Posts: 235

**Pre-Algebra**

(7y)(5z) = 35yz (-10r)(5s) = -50rs

*September 14, 2009*

**physics**

A man stands on the roof of a 19.0 m-tall building and throws a rock with a velocity of magnitude 30.0 m/sat an angle of 42.0 degrees above the horizontal. You can ignore air resistance. Calculate the maximum height above the roof reached by the rock. Calculate the magnitude ...

*September 14, 2009*

**language arts**

breaking it down into simpler structure would be: The boy tricked the girl subject is boy.

*August 31, 2009*

**algebra**

distribute the 5 first x+9=20x-10 combine like terms 19=19x x= 19/19 x=1

*August 31, 2009*

**physics [vectors]**

The concept i get, but somehow i just can't execute this problem, please help me! You are given vectors A = 5.5 6.2 and B = - 3.7 7.4 . A third vector C lies in the xy-plane. Vector C is perpendicular to vector A and the scalar product of C with B is 19.0. I need x and y ...

*August 30, 2009*

**Calculus**

this is how you plug it in: [(x + Δx)^2 + 1- (x^2 + 1)]/(Δx) Rework the equation to get: Δx + 2x, in it should be lim as Δx goes to 0, and that would leave you with 2x, which if you used easy method, leaves you with same answer.

*August 30, 2009*

**statistics**

females males 26 33 35 40 75 50 63 32 36 28 71 39 54 32 68 33 37 31 48 36 42 26 43 37 73 38 55 21 47 39 71 48 27 38 56 36 37 59 25 59 88 53 42 59 33 35 66 38 45 24 53 28 46 45 74 28 58 23 51 15 58 61 48 31 48 17 42 55 55 31 50 55 61 37 28 36 41 20 58 48

*August 10, 2009*

**statistics**

A researcher has observed independent samples of females and males, recording how long each person took to complete his or her shopping at a local mall. The respective times, in minutes, are listed in file. Using the 0.025 level of significance in a one-tail test, would ...

*August 10, 2009*

**statistics**

Please only the formula and steps to do this problem. Thank you An assembly process includes a torque wrench device that automatically tightens compressor housing bolts; the device has a known process standard deviation of ó = 3 lb-ft in the torque applied. A simple ...

*August 2, 2009*

**statistics**

Please only the formula and step I need for this problem. thank you In response to media inquiries and concerns expressed by groups opposed to violence, the president of a university with over 25,000 students has agreed to survey a simply random sample of her students to find ...

*August 2, 2009*

**statistics**

Please, give the formula and steps to do this problem. Thank you The average length of a flight by regional airlines in the United States has been reported as 299 miles. If a simple random sample of 30 flights by regional airlines If The average length of a flight by regional ...

*August 2, 2009*

**statistics**

If a sample of size 30 is selected, the value of A for the probability P(t greater or less A) = 0.01 is?

*August 1, 2009*

**statistics**

If a sample of size 30 is selected, the value of A for the probability p(t¡Ý A)= 0.01 is?

*August 1, 2009*

**Statistics**

8.11) For the manufacturing plant discussed in Exercise 8.10, the union president and the human resources director jointly select a simple random sample of 36 employees to engage in a discussion with regard to the company’s work rules and overtime policies. What is the ...

*July 23, 2009*

**Statistics**

For the manufacturing plant discussed in Exercise 8.10, the union president and the human resources director jointly select a simple random sample of 36 employees to engage in a discussion with regard to the company’s work rules and overtime policies. What is the ...

*July 22, 2009*

**Statistics**

city law enforcement has state that 20% of items sold by paywn within city stolen john purchase 4 items from city pawn shop for x=the number of john purchase that have been stolen how I can determine:a P(x=0, b P(2<=x), cP(1-<x-<3) and d P(x-<2).. Try

*July 21, 2009*

**Statistics**

how you can use sampling distribution and the concept of Central Limit Theorem to apply information and make good predictions and estimations when you shop for a particular item or product?

*July 20, 2009*

**Statistics**

For the manufacturing plant discussed in Exercise 8.10, the union president and the human resources director jointly select a simple random sample of 36 employees to engage in a discussion with regard to the company’s work rules and overtime policies. What is the ...

*June 29, 2009*

**Chemistry**

The correct answer is 1.8 mL

*March 1, 2009*

**algebra I**

F math someone go Fock yourself

*February 18, 2009*

**PSAT format**

For the reading section is the format part 1 vocab 2 short passages 1 long part3 vocab 2 short passages 2 short or is it the other way around

*October 17, 2008*

**1st grade,Middle Sound**

which words have middle sound?

*October 9, 2008*

**math**

1x1

*October 8, 2008*

**math**

what is the probability 1.4

*October 8, 2008*

**Math**

What would be considered as a competitive interest rate and was is a compeititve interest rate?

*May 23, 2008*

**math**

y the factors are (x-4+3i) and (x-4-3i) ???Can you explain please?

*April 21, 2008*

**math**

Which equation has the complex number 4-3i as a root? 1) x^2+6x-25=0 2) x^2-6x+25=0 3) x^2+8x-25=0 4) x^2-8x+25=0 Can anyone please teach me how to do it?THANKS A LOT!!!

*April 21, 2008*

**physics**

but i got .00144 for the answer... the correct answer should be 8.0*10^-4 how come?

*February 10, 2008*

**physics**

A steel beam is used in the construction of a skyscraper. By what fraction (change in L)/(Lo) does the length of the beam increase when the temperature changes from that on a cold winter day (-15 F) to that on a summer day (+105 F)? Can anyone please give me some hints to do ...

*February 10, 2008*

**GRAMMAR**

how should i now what form of the word to put in sentense

*October 24, 2007*

**algebra**

Simplify (1/R_1)+(1/R_2)

*October 9, 2007*

**Math - Algebra**

The answer is 3 (choice E). If 3n-4=n+2... you need to breakdown the equation. Add 4 to both sides. So that leaves you with 3n=n+6. Subtract 1n from both sides. So that leaves you with 2n=6. Divide both sides by 2... therefore n=3.

*May 20, 2007*

**Micro Economics**

A nation's production possibilities curve is "bowed out" from the origin because a. resources are not equally efficient in producing every good c. resources are scarce d. wants are virtually unlimited . John has a paper route and spends all his weekly allowance ...

*April 3, 2007*

**Math**

Write your answer in standard form. Show all your work if you want to be eligible for partial credit. Write the equation of a line perpendicular to the line y = (2/3)x - 7 and passing through the point (4,-2). The slope of the line y = (2/3)x - 7 is 2/3. The slope of a line ...

*November 7, 2006*

**Math**

The sum of two numbers is 63 . The smaller number is 9 less than the larger number. What are the numbers?

*October 22, 2006*