# Posts by Laurie

Total # Posts: 195

**Math**

Looks great: 10m - 2m = 8 8m = 8 Divide by 8 to isolate m. m = 1

**Math**

They are known as coefficients of x and y written in standard form: Ax+By=C

**Math**

Reiny: I have submitted both explanations and this one time an answer. I answered it since this is an actual response I have gotten for one the questions I posed on this forum. After receiving an answer with no explanation, I assumed for a moment that it was acceptable. ...

**Algebra**

Let "n" be a positive integer. How many points (x,y) in the coordinate plane are there such that x and y are integers and 0<y<x<n? Algebra - Scott yesterday at 9:05pm (n - 1)(n - 2) Algebra - Laurie yesterday at 9:55pm Scott, does mean that there is only one...

**Algebra**

Scott, does mean that there is only one point for this problem? Is it (2,1) Can you explain why you set it up as 2 binomials? Any further explanation would be greatly appreciated.. Thank you so much.

**Algebra**

Let "n" be a positive integer. How many points (x,y) in the coordinate plane are there such that x and y are integers and 0<y<x<n?

**math**

2/3=1.2/x 2/3 (x)=1.2 2(x)=3.6 divide by 2 on both sides. x=1.8

**Math**

A farmer has 1,000 yards of fence to use to make a rectangular corral. Let x be the length of the corral. Why does A(x)=x(500-x) represent this situation? Where did the 500 come from?

**Algebra**

False. Irrational numbers cannot be expressed in the form of a/b. Rational numbers can.

**algebra**

110 children's tickets were sold and 210 adult tickets were sold. Using the first 2 equations set up by Scott & ignoring the last 2 steps, I used substitution to solve for c "the number of children's tickets sold. 6c+8(320-c)=320 6c+2560-8c=320 -2c+2560=320 -2c=-...

**Math**

Distributive Property

**Math**

If a light bulb that burns 3 hours a day lasts for 22.8 years, then how long will a light bulb that burns for 7 hours a day last?

**math**

A depositor opens a new savings account with $ 8000 at 8 % compounded semiannually. At the beginning of year 3?, an additional ?$6000 is deposited. At the end of four ?years, what is the balance in the? account?

**Math**

50

**chemisty**

if you react 1.20g of copper metal with excess silver nitrate, how many moles of silver metal are produced?

**Gaussian Elimination Method**

z-d-b=200 z +2b=250 b=150

**Math**

Find two numbers whose product is 20 and whose quotient is 5

**Algebra**

The monthly income I, in dollars, from a new product is given by I(t) = 75000 − 55000e^−0.003t where t is the time, in months, since the product was first put on the market. (Round your answers to the nearest dollar amount.) (a) What was the monthly income after ...

**Math**

If a 2-inch pipe will fill a tank in 6 hours, how long will it require for a 3-inch pipe to fill it?

**Math**

Donations to an annual fundraiser are 15% greater this year than last year. Last year, donations were 10% greater than the year before. The amount raised this year was $10,120. How much was raised 2 years ago?

**Math**

40 students are in the science club. 45% are girls. New girls enter the club and now the percentage of girls is 56%. How many new girls join the club?

**Science**

Thanks

**Science**

A basketball momentarily changes shape as it bounces off the floor. This is due to balanced forces acting on the ball. True False False?

**Technology**

Thanks :)

**Technology**

1. Which of the following is NOT an example of a objective question? A. multiple choice B. essay** C. true/false D. matching 2. Why is it important to recognize the key word in an essay question? A. It will provide the answer in an essay B. It will show you a friend’s ...

**Algebra ( QUAdratic)**

Where did the 50 come from? What exactly does 50 represent?

**Algebra 2**

I have gotten two different answers to the following problem. Can someone please let me know which answer is correct? (5 - 6)³ + 14 ÷ (2 + 5) = -1 + 14/7 = -1 + 2 = 1 or 1 + 14/7 = 1 + 2 = 3 I think it is 1. Thank you.

**algbra 2**

Can you let me know if the answer to the following problem is 11 2/3? Thank you 4² + [15 ÷ 9 - 3(2)] = 11 2/3??

**Thank You To All of You Who Help**

Thank you to all the people that answers questions on this website. It is truly helpful to people like me. I don't know how to respond to those of you that help me, but Thank You!

**High school Algebra**

For the following example: 5 * 6 - 2 * 4 = 30 - 8 Does this represent the substitution property? I am assuming yes since you are substituting 5*6 for 30 on the other side of the equation. Thank you to those who answer. I was not sure how to send a thank you reply.

**Algebra II**

Can you please help me solve the following problem: 4² + [15 + 9 - 3(2)] Thank you.

**algebra**

Not sure. How

**algebra**

The length of a rectangular piece of steel in a bridge is 4 meters less than triple the width. The perimeter of the piece of steel in a bridge is 4 meters less than triple the width. The perimeter of the piece of steel is 48 meters. Find the length of the piece of steel = find...

**Microeconomics**

10. Bob must ship his belongings worth 1,000 to England from Latin America. The prob- ability that a ship sinks and he loses the entire value of his shipment is 0.1. Assume that if one ship sinks it does not affect the probability that the second ship sinks. He has the option ...

**Math**

A car rental company charges $100 for the first 50 miles and $10 for every additional 10 miles. If Gregg traveled 150 miles, how much would he pay?

**math**

A car rental company charges $100 for the first 50 miles and $10 for every additional 10 miles. If Gregg traveled 150 miles, how much would he pay? I know the answer intuitively is $200, but how do I set up this equation

**English**

My father was a hard working man but didn't earn much money. Is this sentence correctly punctuated?

**Calculus**

Find the area of the region enclosed by the parabolas y=x^2 and y+2x-x^2

**Calculus**

2x -------- (x-2)(x+2) using partial fractions That's supposed to be a division sign of some sort

**Calculus**

xe^x using integration by parts

**Physics**

1. A car decelerates at -3.8 without skidding when coming to rest on a level road. What would be its deceleration if the road is inclined at 9.3° and the car moves uphill? (Asume the same static friction coefficient and the car is on the verge of skidding)

**please check(Social studies)**

Karen is 100% correct!

**Science -Check Answers-**

Yep, Mariana was correct I got all my answers correct. Thanks

**math**

How many edges are in K15, the complete graph with 15 vertices

**Math**

Mr. Thomas spent 1600.00 of his savings on a TV and 2/5 of the remainder on a refrigerator. He had 1/3 of his original amount of savings left. What was Mr. Thomas's original savings?

**Biology**

What could be a benefit for a plant that can switch between cyclic and non-cyclic electron transport? Think about the products of electron transport and what products are needed for the Calvin Cycle.

**Chemistry**

Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n = 6 to n = 1.

**Algebra**

Multiply: -8(2a+4b-6)

**math**

is the formula "y=x to the 7th power" an example of a proportional relationship?

**t-test**

For a single-sample t-test the t(17) = 2.90, p<.02, how many were in the study?

**statistics**

Want to find if students who are musicians have higher Iq test scores than the general population. the researcher predicts that playing music is associated with higher IQ scores. the researcher selects a sample of 75 musicians from area and gives them an IQ test. The mean for ...

**Probability**

The probability that an individual egg in a carton of eggs is cracked is 0.05. You have picked out a carton of 1 dozen eggs (that’s 12 eggs) at the grocery store. Determine the probability that at most two of the eggs in the carton are cracked

**Probabilities Help**

The probability that an individual egg in a carton of eggs is cracked is 0.05. You have picked out a carton of 1 dozen eggs (that’s 12 eggs) at the grocery store. Determine the probability that at most two of the eggs in the carton are cracked

**Probabilities Help**

The probability that an individual egg in a carton of eggs is cracked is 0.05. You have picked out a carton of 1 dozen eggs (that’s 12 eggs) at the grocery store. Determine the probability that at most two of the eggs in the carton are cracked

**algebra**

Determine the comparable interest rate for a $50,000 loan when the quoted information is 11.4% + 0.5 pt + $300.

**economics**

The relationship between consumer expectations and economic performance: Worsening expectations of changes in income might lead to a reduction in confidence and a fall in spending at each level of income. Conversely an improvement in consumer expectations about the health of ...

**Physics**

The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the rod will decrease. The length of the rod will increase. Wouldn't the length double, thus being answer D?

**Physics**

The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the rod will decrease. The length of the rod will increase. Wouldn't the length double, thus being answer D?

**Physics**

If a rod is moving at a velocity equal to 1/2 the speed of light parallel to its length, what will a stationary observer observe about its length? The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the ...

**Physics**

The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the rod will decrease. The length of the rod will increase. Wouldn't the length double, thus being answer D? No one has answered this question yet.

**physics**

If a rod is moving at a velocity equal to 1/2 the speed of light parallel to its length, what will a stationary observer observe about its length? The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the ...

**math**

Find (gof)(-2) f(x)=Squareroot of 4-x; g(x)=1-3x^2

**math**

What is the domain of the function f(x)=11/Squareroot of 4-x^2 a.(-11,11) b.[-11,11] c. (-2,2) d. [-2,2] What is the range of the function? y=8/Squareroot of 4-x^2 a. [4, infinity) b. (-infinity, 4] c. [8, infinity) d. (-infinity, 12] e. [6, infinity) f. (-infinity, 6]

**Math/Algebra**

y^2+6+2(y^2+5) My answer is 3y^2+16 (simplifying) but the hawkes learning system won't accept this answer. Am I missing something?

**Calculus Voulme**

find the volume of the solid generated by revolving the region r bounded by the graphs of the given equations about the y-axis. x^2+y^2=1 x=1 y=1

**calculus derivatives**

Please confirm: {(5x+2)^4/x^2-3x+1)^3}= 20(5x+2)^2(x^2-3x+1)^3 -3x^2(5x+2)^4 (x^2-3x+1)^2/(x^2-3x+1)^6

**algebra**

Joey is flying a kite that is attached to a string 200 yards long. The kite is as high as it can go and is flying directly above Joey's house which is 50 yards in front of Joey. How high above the ground is the kite?

**Physics**

Six light bulbs are connected in parallel to a 9.0 V battery. Each bulb has a resistance of 3.0 ohms. What is the current in each bulb?

**math**

how to factor w^2r^2-1

**Chemistry**

A 1 kg block of ice, at 0.0 celcius is added to a picnic cooler. How much heat will the ice remove as it melts into water at 0.0celcius?

**Chemistry**

What volume of 3.0M sodium hydroxide will be needed to neutralize 2.0 L of 1.0M hydrochloric acid?

**Literacy**

11. In the article, "How Lethal Was the K-T Impact?" by Richard A.Kerr and Virginia Morell, what is listed as part of the related subject matter? The answer is: D. Asteroids

**Math**

Use a radius of 50 and 3 for pi to estimate the area. Then use a radius of 40 and 3 for pi to estimate the area. Is your answer reasonable? Why?

**Literacy**

A strong search strategy for a search engine would include which of the following? The Answer is: D. Using quotation marks, hyphens, and unique words

**Literacy**

19. Which of the following keyword searches should retrieve the most results in an online database? A. Beta B. Beta OR blockers C. Beta NOT blockers D. Beta AND blockers Answer: B

**physics**

Lasers are used to try to produce controlled fusion reactions. These lasers require brief pulses of energy that are stored in large rooms filled with capacitors. One such room has a capacitance of 64 10-3 F charged to a potential difference of 7 kV. (a) Given that W = 1/2C&#...

**ETHNIC DIVERSITY**

This is honestly the first of its kind in regards to this situation I have came across in my year of attendance. I have had similar classes, but the assignments have all been relevant to today's world and research has been "easy" in comparison. At least in my ...

**ETHNIC DIVERSITY**

I appreciate what you are saying. I did contact my instructor asking for any insight into what might be considered either "credible" information regarding this or even a push in the right direction to finding information on policy. The only response I received was to...

**ETHNIC DIVERSITY**

I agree completely. Honestly I have researched this for 2 days and can find nothing regarding recent (within the past 2 years) regarding this. It has to be noted this comes from a text book that was published in 2006, and from what I am finding this question has been around ...

**ETHNIC DIVERSITY**

I am trying to locate credible information in regards to the following question. Please note, I do not want the answers, just possible locations that might provide me with a place to start looking as I can not find anything recent. According to research and news reports within...

**math**

-34

**math**

An arcade uses 3 different colored tokens for their game machines. For $20 you can purchase any of the following mixtures of tokens: 14 gold, 20 silver, and 24 bronze; OR, 20 gold, 15 silver, and 19 bronze; OR, 30 gold, 5 silver, and 13 bronze. What is the monetary value of ...

**Chemistry**

Element X has three istotopes, X⁹⁵, X⁹⁶, and X⁹⁸. Element X has an atomic mass of 96.344u. If X-98 has a mass of 98.0001u and an abundance of 19.8%, what are the abundances of X-96 (mass of 95.9988u) and X-95 (mass of 95.0011u)?

**Chemistry**

Element X has three istotopes, X⁹⁵, X⁹⁶, and X⁹⁸. Element X has an atomic mass of 96.344u. If X-98 has a mass of 98.0001u and an abundance of 19.8%, what are the abundances of X-96 (mass of 95.9988u) and X-95 (mass of 95.0011u)?

**Chemistry**

Element X has three istotopes, X⁹⁵, X⁹⁶, and X⁹⁸. Element X has an atomic mass of 96.344u. If X-98 has a mass of 98.0001u and an abundance of 19.8%, what are the abundances of X-96 (mass of 95.9988u) and X-95 (mass of 95.0011u)?

**Chemistry**

Nitrogen effused through a pinhole 1.7times as fast as another gaseous element at the same conditions.Estimate the other element's molar mass. Answer in units of g/mol

**Chemistry**

.2757g

**Chemistry**

A 23 L flask at 254 K and 19 Torr contains nitrogen. What mass of nitrogen is present? Answer in units of g.

**calculus**

Find equations for the lines that are tangent and normal to the graph of y = sinx + 3 at x = pi

**math**

Find the volume of a cone with a height of 7.1 m and a circular base whose radius is 3.2 m. Use 3.14 for pi.

**Social STUDIES**

in kennedys inaugural address what was the first revolution president kennedy spoke of was it the american revolution,the emancipation proclamation,the war of 1812

**grammar**

e. the sentence is fine as it is.

**English**

Can you tell me if I have this correct? I have to identify the adjectives and adverbs in this paragraph. Adjectives: early first huge high several Adverbs: monthly severely monthly ridiculously eventually immediately monthly Like so many people, early in life I was not very ...

**algebra**

F(4)=8 what is the ordered pair

**literature**

In the book code orange: How do they cure the small pox?

**Chemistry**

you have to find the Ksp in the back of your chemistry book.

**need help**

I have this equation y+x=-7 I have to graph my answers to find out what my y is. I have tried everything, and I cannot get my points to cross. Any help would be great.

**health HCA/210**

Thank you for the help. I think there is enough information to get me started. This is my first time using this site and I found it very interesting!

**health HCA/210**

I have a 10 to 12 powerpoint slide due next week and I just wanted to get started on it. I need to explain where health insurance began, the purpose of health insurance, and I have to list the advantages and disadvantages to HMOs, Managed care, PPOs, POS, and Tricare. Any help...

**biology**

If a brown-eyed man marries a blue-eyed woman and they have ten children, all brown-eyed, can you be certain that the man is homozygous? If the eleventh child has blue eyes, what will that show you about the father’s genotype?