Monday

September 26, 2016
Total # Posts: 811

**Chemistry**

Why is the slowest elementary step "the rate determining step"?

*February 16, 2015*

**Math**

Daniel has 21 coins. All of them are either quarters or dimes. Altogether, he has $3.45. How many of each type of coin does he have?

*February 15, 2015*

**Science**

describe how mutation might might have influenced the development of different species of finches that darwin observed on the galapagos islands

*February 12, 2015*

**Science**

Thanks, dude! (:

*February 11, 2015*

**Science**

Describe how evolution and extinction are related.

*February 11, 2015*

**Science**

What are some effects of predation?

*February 8, 2015*

**Math**

Jenny was planting flowers for her garden. She had to plant 4 rose flowers for every jasmine flower she planted. If she plants 100 flowers in all, how many will be jasmine flowers?

*February 8, 2015*

**Math**

There are 750 students in a school. If the number of girls is 120 more than the boys, how many boys are there in the school?

*February 8, 2015*

**9th Grade Algebra**

If a is not equal to 0, and a =2b=3c, what is the value of a+b in terms of c? Would I make up numbers for the variables?

*February 7, 2015*

**Science**

Does air pressure affect species survival?

*February 5, 2015*

**History **

which of the following best describes daily life in the south during the civil war? a.about the same as before the war because factories provided necessities b.difficult but tolerable because most people did not experience major changes c.better because the North tried ...

*February 4, 2015*

**Science**

long wings are dominant to short wings in fruit flies. make a punnett square to show the predicted outcome of a cross between two parents that have both alleles for wing length. what is the ratio of flies produced?

*February 3, 2015*

**Math**

Thank you! So far, i have 12x-6y=21 3x+6y=9 -------- 15x 30 ---=-- 15 15 Y = 2 Is this correct?

*February 3, 2015*

**Math**

4x-2y=7 3x+6y=9 Please help me solve this system by multiplying

*February 3, 2015*

**Math**

Solving systems by Multiplying. 4x-2y=7 3x+6y=9

*February 3, 2015*

**Genetics**

One fruit fly is heterozygous for long wings, and another fruit fly is homozygous for short wings. Long wings are dominant to short wings. Using a punnett square, find out what percent of the offspring are expected to have short wings.

*February 1, 2015*

**Science**

Hello please help me with another question! - One fruit fly is heterozygous for long wings, and another fruit fly is homozygous for short wings. Long wings are dominant to short wings. Using a punnett square, find out what percent of the offspring are expected to have short ...

*February 1, 2015*

**Science**

Thank you so much!

*February 1, 2015*

**Science**

suppose a male mouse is Bb and a female is bb. What percent of the mice offspring from these two mice would you expect to have black fur?

*February 1, 2015*

**Math**

X-Y=5 X-Y=11

*January 28, 2015*

**Science**

How could genetic engineering of plants be useful to people? Give examples

*January 19, 2015*

**Science**

DNA can perhaps best be compared to a(n) A. secret code or B. electrical circuit

*January 19, 2015*

**Science HELP!!!**

What happens after genes are injected into an organism?

*January 15, 2015*

**Science HELP!!!**

What happens after genes are injected into an organism?

*January 15, 2015*

**MATH!**

Water flows over a dam at a rate of 500 gallons per minute. Write a function rule relating the amount of water (A) that flows over the dam to the number of minutes (M) that have passed. What are the initial value and rate of change?

*January 5, 2015*

**Math**

An orchestra buys music stands for $42 each with $298 in its bank account. Write a function rule that shows how the account balance depends on the number of stands bought. What are the initial value and rate of change of the function?

*January 4, 2015*

**Math**

The clock struck midnight as the elves roared with approval for Santa to give his gift to Macy. How many hours would pass by if Santa could give out another gift tomorrow at midnight?

*December 21, 2014*

**math **

find the length of the curve y^2=x^3 between x=0 and x=5

*December 16, 2014*

**english**

I KNOW what the caged bird feels, alas! When the sun is bright on the upland slopes; When the wind stirs soft through the springing grass, And the river flows like a stream of glass; When the first bird sings and the first bud opes, I know why the caged bird beats his wing ...

*November 6, 2014*

**english**

Both texts deal with racial discrimination. How does the structure of poem help convey this meaning in a way that the prose passage does not? A)The poem conveys meaning through imagery; the prose passage does not. B)The poem uses first person point of view; the prose passage ...

*November 6, 2014*

**english**

i honestly don't understand the story then the questions makes it harder i wanted help on that

*November 6, 2014*

**english**

help please

*November 6, 2014*

**english**

A few weeks ago I was in company with my friend Josephine S. Griffing, when the conductor of a streetcar refused to stop his car for me, although (I was) closely following Josephine and holding on to the iron rail. They dragged us a number of yards before she succeeded in ...

*November 6, 2014*

**sixth grade math**

A punch recipe says to mix 4 cup pineapple juice,8 cups orange and 12 cups seltzer in order to make 18 servings of punch. A. How many cups of each ingredient do you need to ma ke 108 cups of punch? Help me

*November 4, 2014*

**English**

What is a preterite? I am very confused on this. Is a preterite something that describes past events? For example, When I was younger, I liked visiting my grandparents house. If so, what would be the preterite in the sentence? Would it be younger?

*September 28, 2014*

**Language Arts**

the answers to the entire test are D D C D C

*September 16, 2014*

**Math**

Find the equation for the exponential function that passes through the pairs of points given. Through (-1,2) and (3,1). I don't know if this is the right way to work this or what the next step is i am just very confused. Please help, thank you! y=Ab^x 2=Ab^1 1=Ab^3 2=(1/b^...

*September 12, 2014*

**math**

How long to the nearest year, will it take an investment at a rate of 12.7% to double its value if the interest is compounded every 6 months? I keep getting 568 years, I know this is not right. Could you please show me how to do this, do I take the log of both sides or just ...

*September 11, 2014*

**geometry - need help with this.**

If angle <a and <b are complementary but <a is four times as large as <b, find the measurement of a.

*September 7, 2014*

**Math**

I have no Idea how to set this up to work. Please help! Nutrition one serving of campbell's soup companies campbell's pork and bean contains 5 grams of proton and 21 grams of carbohydrates. a typical slice of lite rye bread contains 4 grams of proton and 12 grams of ...

*September 5, 2014*

**Psychology**

I wanted to know if someone could give me an example of hypotheses for a 2 x 2 factorial anova

*May 31, 2014*

**Physics: Earthquakes**

I'm studying for an upcoming exam and I came across this problem: 10 seconds separate the P- and S-wave arrival times of an earthquake which shakes you 1m. How far away is the earthquake epicenter and what is the magnitude? I'm stuck and would really appreciate the ...

*April 28, 2014*

**Statistics**

You take a trip by air that involves three independent flights. If there is an 67% chance each specific leg of the trip is on time, what is the probability all three flights arrive on time? (Round your answer to 3 decimal places.) Probability =??

*April 4, 2014*

**Business statistics**

You take a trip by air that involves three independent flights. If there is an 67% chance each specific leg of the trip is on time, what is the probability all three flights arrive on time? (Round your answer to 3 decimal places.) Probability=

*April 4, 2014*

**Algebra**

It's not fun for me. It's stressful, and it takes a lot of time. Time I could spend on American literature, History, or learning French. Your sugar mama/daddy joke is funny, but I don't see where these equations and expressions will fit into my life. I'm tired ...

*March 28, 2014*

**Algebra**

No... I'm confused. Is this going to be useful later in life?

*March 28, 2014*

**Algebra**

In the last one, I tried just cancelling out factors and got 2m^2/12m^3? Is that close, or no?

*March 28, 2014*

**Algebra**

For the first one, I can kinda see how I could factor v^2 + v - 12.. Would it look something like 2(v -6)? Which is like the numerator on the other side.

*March 28, 2014*

**Algebra**

Please help me simplify the expressions and solve the equations? 1. v^2 + v - 12/ v^2 + 6v + 8 divided by 2v - 6/ v +2 2. 2/ b-2 = b/ b^2 - 3b +2 + b/ 2b - 2 3. 1/ x-2 + 2x/ (x-2)(x-8) = x/ 2(x-8) 4. (m^2 + 2m + 1/ m^3 + 3m^2 + 3m +1 (m^2/m - 3m/3) Thanks!

*March 28, 2014*

**Algebra**

Please help me solve this problem? 3/x + 6/ x+3 = 8/ x+1 Thank you

*March 28, 2014*

**Algebra**

Can you help me work this out with long division? r^2 - 7r + 12/ r+4 divided by r^2 - 7r +12/ r^2 + 6r +8 Thanks.

*March 28, 2014*

**Algebra**

Can you please help me with these Algebra word problems? Complete the following word problems. 1. Tell whether the table represents inverse variation. If so, write the inverse variation equation and solve for y when x = 4. Show work that supports your conclusions. Table: ...

*March 28, 2014*

**Business Statistics**

What is the median of 29, 49, 27, 64, 79, 59, 29 and 41? 29.0 45.0 59.5 49.0

*March 27, 2014*

**Algebra**

Simplify the expression, if possible. State the excluded values, if any. 1. 5x - 5/ 10x^2 - 25x + 15 2. w^2 + 6w + 9/ 2w^2 - 18 Thanks so much.

*March 21, 2014*

**Algebra**

Okay. Thanks so much. :)

*March 20, 2014*

**Algebra**

I'm asked to simplify these expressions by using long division. I've attempted these a few times and I'm very confused. Any help you can provide would be very much appreciated. 1. (72 - 8x^2 + 4x^3 - 36x) / (x - 3) 2. (8b^3 - 6) / (2b - 1) Thank you.

*March 20, 2014*

**Algebra**

1. How far is the Willis Tower from Navy Pier, given that each unit is approximately 1/8 mile? Round your answer to the nearest tenth of a mile. The Willis Tower is at the point (-6,-3) and NP is at the point (10,9). I did this calculation: d^2 = (10 - (-6))^2 + (9 - (-3))^2...

*March 13, 2014*

**Algebra**

y = 1/2x - 2 Is that right?

*March 13, 2014*

**Algebra**

Find the equation in slope-intercept form of the line that is the perpendicular bisector of the segment between (-3,4) and (3,-8) Can you help me figure this out? Thank you!

*March 13, 2014*

**Algebra**

This is Algebra. Haha.. You can take algebra between 8th and 11th grade. Something like that.. Not really a grade thing.. Just a subject. Why do you ask?

*March 11, 2014*

**Algebra**

# 2: * I need to find the length of a (the short leg), the length of b, and the length of the hypotenuse.

*March 11, 2014*

**Algebra**

Hi. 1. I have a right triangle here. I know that I am to use the Pythagorean Theorem: a^2 + b^2 = c^2. In this case, side a is (x + 4) and b is x. The hypotenuse is 4 + (x + 4) So here we have the equation: (x + 4)^2 + x^2 = 4 + (x + 4)^2. I need to find the length of a (the ...

*March 11, 2014*

**Algebra**

You say that I can't use a^2 + b^2 = c^2, but that formula is called the Pythagorean theorem. I was instructed to use that formula. Am I misunderstanding what you're saying?

*March 11, 2014*

**Algebra**

For #1: When I get √(9y - 196) = -7 can I square each side to get 9y - 196 = 49? Then I can add 196 to both sides. It cancels out on the left side and I have 9y = 245. Then I can divide both sides by 9. I would get y = 27.2. Would that be correct?

*March 11, 2014*

**Algebra**

I have a couple questions about # 1. Why can't it be a^2 + B^2 = c^2? I think that's what I'm taught in class. Also, if you square everything, isn't still going to come out the same? If you do something to the entire expression, it doesn't change the value...

*March 11, 2014*

**Algebra**

1. √(9y - 196) + √196 = √49 My work: I squared all 3 roots and got 9y - 196 + 196 = 49 The - 196 + 196 cancels out and we are left with 9y = 49. divide 49 by 9. = 49/9. I'm pretty sure this is wrong. Can you show me where I messed up? 2. √x(√9...

*March 11, 2014*

**Algebra**

Well, I entered in the calculator √28 + √63 + √175 and got 6.06. I just entered the expression. I didn't take the sq roots first.

*March 11, 2014*

**Algebra**

I have a question. #3: On my calculator, √28 + √63 + √175 = 6.06, but 10√7 = 26.5. Shouldn't they = the same number? As for #5.. I'm not really sure, tbh. I tried that problem a while a go and I'm not quite sure where I was going with it.

*March 11, 2014*

**Algebra**

Simplify the expressions and solve the equations 1. 2√3 - √12 My answer: 2√3 - 2√3 = 0 2. √(5p + 5)^2 = √(6p + )^2 I got the answer p = 4 3. √(28) + √(63) + √(175) This one seems so simple. I tried multiple times, but I can...

*March 11, 2014*

**Algebra**

Okay, I have a graph of a sq root function. I'm told to write the radical function for f(x). Some points on the line are (1,-2) and (5,0). I know you probably can't help me a whole lot, but if you can give me any insight into how to figure this problem out, I'd ...

*March 11, 2014*

**Algebra**

Y values: -2, -1, 0, 1. Right? I'm not sure why I had so much trouble with this. I think I was making a minor mistake in my calculations that set everything off. Thanks for your help.

*March 11, 2014*

**Algebra**

Okay. Thank you. :)

*March 11, 2014*

**Algebra**

Complete the table for each function. 1. f(x) = √x The x values are 0, 1,4 and 9. The corresponding y values that I got are 0, 1, 2 and 3. 2. g(x) = -1/4√ x The x values are 0, 1, 4, and 9. The corresponding y values that I got are 0, -1/4, -1/2 and -3/4 3. h(x...

*March 11, 2014*

**Inverse laplace**

Given F(s) = 1/((s-1)^(2)(s+1)) After using partial fractions, I got (1/4)[(2/((s-1)^(2)))+(1/(s+1))-(1/(s-1))] before applying Laplace inverse. Apparently, the answer is (1/4)[2te^(t) + e^(-t) - e^(t)], however I don't know where the t in 2te^(t) came from. Can someone ...

*March 6, 2014*

**Polynomial**

Arrange the terms of the polynomial in descending powers of p. 13rp-4r^4p^4-4r^2p^3 Is my answer correct? -4r^4p^4-4r^2p^3-13rp

*March 2, 2014*

**Algebra**

That is the wrong answer

*March 2, 2014*

**Algebra**

Arrange the terms of the polynomial in ascending powers of b. 25db^5-7dm+3b^10-6db^6 My answer is: Am I correct? 25b^5d-7dm+3b^10-6b^6d=3b^10-6b^6d+25b^5d-7dm

*March 2, 2014*

**Intermediate Algebra**

Given f(x)=5+6x-x^2 find and simplify. A)f(t-2)=____? B)f(z+h)-f(z)=____? C)f(b)+3=_____?

*March 2, 2014*

**Algebra**

Arrange the terms of the polynomial in descending powers of p. 13rp-4r^4p^4-4r^2p^3

*March 2, 2014*

**Algebra**

Given f(x)=5+6x-x^2 find and simplify. A)f(t-2)=____? B)f(z+h)-f(z)=____? C)f(b)+3=_____?

*March 2, 2014*

**Algebra**

I have a word problem here. A batter hits a fly ball. A scout in the stands makes the following observations. Time (in secs) .75, 1.5, 2, 2.75, 3.25, and 4.75 Height (in feet) 77, 133, 160, 187, 194, and 169 1.What type of function best models this data? Linear, Exponential, ...

*February 28, 2014*

**Algebra**

1. Parent Quadratic Equation 2. Coordinate of the vertex 3. quadratic formula A. -b/2a B. y = 2x C.b^2 - 4ac D. y = a(x - h)^2 + k E. x = -b +/- (square root of) b^2 -4ac/2a I think the answers are: 1. B 2. C 3. E Are these correct? Thanks!

*February 28, 2014*

**Algebra**

Thank you. Also thanks for correcting the "whether" VS. "weather" mistake. I always have trouble with that. :)

*February 28, 2014*

**Algebra**

Hiya! I have a function here: y = x^2 - 4x - 32 I have some questions about it. 1. I think this parabola opens up. Am I correct? Can you explain how you know weather it opens up or down? 2. Can you tell me what the axis of symmetry and the vertex of this parabola are? 3. Can ...

*February 28, 2014*

**Algebra**

Thank you!

*February 26, 2014*

**Algebra**

I have a graph here. The vertex is (4,-4), then the points (3,-3) and (5,-3), then the points on the x axis are (2,0) and (6,0), then the points (1,5) and (5,5). This is a parabola that opens up. I'm asked to write a function for f(x) in standard form. I'm a little ...

*February 26, 2014*

**Algebra**

Will you please check my work? I'm supposed to "Use square roots to solve the following equations; round to the nearest hundredth, if necessary." 1. 5x^2 - 526 = -651 My Work: 5x^2 - 526 + 526 = -651 + 526 (sq root of) 5x^2 = (sq root of) -125 = 5x/5 = 11....

*February 26, 2014*

**Algebra**

I wrote the first problem incorrectly. It's supposed to be 5x^2 - 526 = -651 I apologize.

*February 26, 2014*

**Algebra**

Will you please check my work? I'm supposed to "Use square roots to solve the following equations; round to the nearest hundredth, if necessary." 1. 5x^2 - 256 = -651 My Work: 5x^2 - 526 + 526 = -651 + 526 (sq root of) 5x^2 = (sq root of) -125 = 5x/5 = 11....

*February 26, 2014*

**Algebra**

My problem was that I didn't understand that they wanted me to plot the positive AND the negative x values (hence why they labeled them +/-)to form the parabola. Thank you for your help!

*February 25, 2014*

**Algebra**

Okay, so I'm asked to "Complete the table for each function". 1. f(x) = x^2 x = 0, +/-1, +/-2, +/-3 y = 0, 1, 4, 9 So, I plugged each of the x values into the equation and got the y values that are shown above? Are those correct, or did I do something wrong? We ...

*February 25, 2014*

**English**

A. Do you know what you want to become when you grow up?

*February 25, 2014*

**APA Format**

How should I input a sub-heading in APA format? For example: Community Core (centered/bold) Demographics of community (left aligned/indented/not bold)

*February 22, 2014*

**Intermediate Algebra**

(Thank you for all your help on this site) A basketball team recently scored a total of 95 points on a combination of 2-point field goals, 3-point field goals, and 1-point foul shots. Altogether, the team made 54 baskets and 16 more 2-pointers than foul shots. How many shots ...

*February 20, 2014*

**Algebra**

I got 405, 210, and 163.

*February 20, 2014*

**Algebra**

In the United States, the highest incidence of fraternal twin births occurs among Asian-Americans, then African-Americans, then Caucasians. Of every 16200 births, the total number of fraternal twin births for all three is 778, where there are 195 more for Asian-Americans than ...

*February 20, 2014*

**Algebra**

In triangle ABC, the measure of angle B is 8 degrees more than three times the measure of angle A. The measure of angle C is 37 degrees more than the measure of angle A. Find the measure of each angle. What is the measure of angle A__? What is the measure of angle B__? What is...

*February 18, 2014*

**10th grade Science**

Explain how a drug sits on acetylcholine receptors will affect muscle function? Is it because the drug would act as a blocking agent to prevent the receptors from gathering information on what to do?

*February 8, 2014*

**science --- pls check my work!!!**

1:a 2:3

*February 8, 2014*

**Anatomy and Physiology**

Explain how a drug that sits on acetylcholine receptors will affect muscle function? Is there a good source online to find the above question? My book doesn't go into great detail for me to answer the question.

*February 7, 2014*