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?

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