Thursday

October 30, 2014

October 30, 2014

Total # Posts: 865

**algebra**

For the expression 4x-7, what is the smallest whole number value for x that gives a result that is more than 150?
*October 26, 2014*

**Math (sigma stuff!)**

I got it! n is a constant, so it's just 8/n * n(n+1)/2.
*October 25, 2014*

**Math (sigma stuff!)**

Hi! Looking to find n∑k=1 8(k/n) (n is supposed to be on top, k=1 below the sigma sign)in closed form. I've tried doing 8*[(n(n+1)/2)/n], and that didn't seem to work. I'm not sure if I'm supposed to do anything with the n or if it might be an issue with ...
*October 25, 2014*

**Social Studies**

Why do you think the Spanish felt they had the right to force the indians to work for them?
*October 8, 2014*

**math**

Change 2 2/4 to an improper fraction first
*October 2, 2014*

**Math help algebra**

You have a gift card for your favorite clothing store for the amount of $60. You have found a shirt you want to buy that costs $15. If you don't want to spend more than the amount of the gift card, which of the following inequalities could be used to determine the amount ...
*September 29, 2014*

**Electrophoresis**

You need to prepare 400 ml of a 4M glucose solution. It's chemical formula is C6H12O6 and its formula weight (FW) 180.16. Must show all work and calculation and then list what you will mix together to prepare the correct amount of this solution. 180.16 of glucose/400ml = x...
*September 26, 2014*

**Math**

1 5/6- 3/8= 1 5/6= 11/6 6 and 8 both go into 24 3/8= 9/24 11/6=44/24 44/24-9/24= 35/24=1 14/24
*September 24, 2014*

**Math**

My answers will be posted 2! 1. Dimensions of the cube is 5x3x1 a. What is the surface area? ( i said 46ft squared ) b. What is the # of cubes? ( I said 15 ) 2. Dimensions are 5x3x2 a. Surface area? ( 62ft squared ) b. # of cubes? ( 30 ) 3. Dimensions are 5x3x5 a. Surface area...
*September 24, 2014*

**math**

Tricycle because, tri means 3
*September 24, 2014*

**statistics 7**

Home values tend to increase over time under normal conditions, but the recession of 2008 and 2009 has reportedly caused the sales price of existing homes to fall nationwide (BusinessWeek, March 9, 2009). You would like to see if the data support this conclusion. The file ...
*September 23, 2014*

**statistics 3**

An airline promotion to business travelers is based on the assumption that no more than two-thirds of business travelers use a laptop computer on overnight business trips. 1. What is the sample proportion from an American Express-sponsored survey that found 365 of 543 business...
*September 23, 2014*

**statistics 2**

In Hamilton County, Ohio the mean number of days needed to sell a home is 86 days (Cincinnati Multiple Listing Service, April, 2012). Data for the sale of 40 homes in a nearby county showed a sample mean of 80 days with a sample standard deviation of 20 days. Conduct a ...
*September 23, 2014*

**statistics 1**

A study found that, in 2005, 12.5% of U.S. workers belonged to unions (The Wall Street Journal, January 21, 2006). Suppose a sample of 400 U.S. workers is collected in 2006 to determine whether union efforts to organize have increased union membership. Formulate the hypotheses...
*September 23, 2014*

**science**

An experiment was performed how the amount of coffee grounds could affect the taste of coffee. The same kind of coffee, the same percolator, the same amount a type of water, the same perking time, and the same electrical source were used. Identifying variables Independent, ...
*September 22, 2014*

**science**

MISS SUE HELP
*September 22, 2014*

**science**

A Scientist wonders if the amount of Vitamin C that he feeds to rats will have any affect on the rat's mass. He measured both the mass of the rats and the amount of vitamin C in grams. I need to find the Independent variable, Dependent variable and the controlled variable?
*September 22, 2014*

**math**

It would be (12,22) The pattern is 2n-2 with n being the input
*September 22, 2014*

**math**

On the third line you have the +25 and -25 they got rid of the -25 To do this they removed it from the bracket to the outside of the function But since it was in the bracket you cannot forget to multiply by the 3 that was on the outside This made the -25 a -75....and when you ...
*September 21, 2014*

**chemistry**

an x-ray photon of wavelength 0.989nm stricks a surface. the emitted electron has a kinetic energy of 969 eV.what is the binding energy of the electron in kj/mol?
*September 20, 2014*

**Science**

i didnt put the coefficients so its not balanced. I just wanted to show your the products
*September 19, 2014*

**Science**

C2H4 + O2 --> CO2 + H2O
*September 19, 2014*

**algebra 2**

The zeros are always the opposite sign of their value in the factors. Example: (x-2) The value in this factor is -2 but when you solve for x to find your zero it would be +2.
*September 19, 2014*

**Math**

Plug in (x-1) everywhere you see an x 4(x-1)^2 + 3(x-1)-3
*September 19, 2014*

**Science**

It should be A because the offspring should get one allele from each parent Say the yellow is YY and the green is gg I put it lowercase because I assumed it was recessive ..g...g Y Yg Yg Y Yg Yg
*September 19, 2014*

**Science**

Yes the dominant trait is usually what shows up in the phenotype.
*September 19, 2014*

**Science**

Sure what is it?
*September 19, 2014*

**Science**

I believe its C because chromosomes are made of DNA. And DNA carries genetic information.
*September 19, 2014*

**Math**

Lets evaluate D 6y-2=2(y-1) Now distribute the 2 6y-2=2y-2 Add two to both sides....in this case they cancel each other. Now we have 6y=2y The only number that will make this equal is 0. SO y=0 here. So D cant be the answer.
*September 19, 2014*

**Math help**

A. 20-x=x change this to 20= x+x What same two numbers add to 20? B. 20-x-6=0 Combine like terms 20 and -6 Now you have 14-x=0 Now solve for x C. x+4=3+x+1 Combine like terms 3 and 1 x+4=4+x In this problem the equations are the same. So there are an infinite amount of numbers...
*September 19, 2014*

**Math**

The problem is a quadratic function so that tells you right there that it has symmetry. Now you just have to find where. Because the problem says x= and not y= our problem with be rotated to the right Its rotated to the right because y can be any value whether positive or ...
*September 19, 2014*

**Pre-Calc Help!**

Yes
*September 19, 2014*

**Pre-Calc Help!**

First factor x^2-8x+15 You should get (x-5)(x-3) Now set each factor equal to zero and solve for x x-5=0 x-3=0
*September 19, 2014*

**Math**

x^4=625 To get x by itself you have to find the 4th root of 625. If you put this in a calculator in will give you 5. So your answer will be +5,-5 You have the put both the negative and positive 5 because the exponent is an even number
*September 19, 2014*

**Math Precal/Trig**

Before trying to distribute first simplify the problem
*September 18, 2014*

**Algebra 2**

5√7/√6 Multiply by √6/√6 to remove the radical from the denominator (5√7)/√6 * √6/√6 What does this give you?
*September 18, 2014*

**Geometry**

No it shouldnt be that small
*September 18, 2014*

**Geometry**

You will have to use the distance formula. Do you know what the formula is?
*September 18, 2014*

**math**

24/25 correct is a 96% score If she only did half as good then she got 96/2=48% on the second test She also got twice as many problems correct. 24*2=48 In this problem the number of problem she got correct is also her percentage. 48 divided by what number will give her a score...
*September 18, 2014*

**Geometry Please help**

Yes
*September 18, 2014*

**Geometry Please help**

First draw out your triangle . It gives you the length of two of the side Vertices (-2,9) and (-2,-3) have the same x values so the line is straight up and down. Find the distance between the y values to find the length of that side Vertices (-2,-3) and (7,-3) have the same y ...
*September 18, 2014*

**Math Gr 12**

Set equal factor to ≥ o (4x+1)≥0 (2-x)≥0 Now solve for x on each one
*September 18, 2014*

**math**

*there
*September 18, 2014*

**math**

It states that the are 1550 MORE ground crew members Because it says more you will add to 665 not subtract
*September 18, 2014*

**math**

Put all the sides in terms of x. X represents the longest side side x side y=(1/3)x side z=x-13 The perimeter is 106 which is the sum of all the sides. x+(1/3)x+(x-13)=106 Solve for x Then it will be easy to find the other sides
*September 17, 2014*

**Algebra**

well you already know the greater the width is the higher the temperature Now you just to put the widths in order. Because they all have different denominators you are going to have to find the least common denominator. 25,50,100,20,5= these are all factors of 100 So rearrange...
*September 17, 2014*

**math**

the ratio of tenants that own cats to tenants that own fish is 4 to 1 ..that is 4 times greater ? to 5 So if 5 own fish what would the of cat owners have to be to have the same ratio
*September 17, 2014*

**Math**

First change the mixed number to an improper fraction.
*September 17, 2014*

**math**

5n is correct it would be your score I guess you could put s=5n S meaning your total score
*September 17, 2014*

**Algebra 2**

To find the slope the equation must be in y=mx+b form To do this rewrite the equation with y by itself 4x+ky=-1 ↓ 4x+ky+1=0 ↓ 4x+1= -ky ↓ (4x+1)/-k=y Now y is by itself Now separate the equation with -k and the denominator 4x/-k + 1/-k =y is in y=mx+b form 4...
*September 17, 2014*

**MATH**

Are you solving for x?
*September 16, 2014*

**Algebra help**

rewrite the problem 7x^2=8x ↓ 7x^2-8x A=7 B= -8 C=0 Plug values in the quadratic formula
*September 16, 2014*

**Need Help with Math**

1/2 * 5/12 = 5/24 1/4 *5/6 = 5/24 1/3 * 5/8 = 5/24 I assumed it could have been random fractions.
*September 16, 2014*

**math**

x^3-18x^2+80 factors into (x+2)(x^2-20x+40)
*September 16, 2014*

**Sixth Grade Simplest Form**

Yes that is correct
*September 16, 2014*

**Sixth Grade Simplest Form**

yes
*September 16, 2014*

**Sixth Grade Simplest Form**

Since he tripled the recipe all you have to do is is multiply by 3 A. Oranges (1/2)*3=? Apples (3/5)*3=? Blueberries (1/4)*3=? Peaches (2/3)*3=? B. You have to change the mixed number back to a regular fraction. Do you know how to do this?
*September 16, 2014*

**math**

Im sorry but could you retype this in English
*September 16, 2014*

**math**

10m describes the height of the bridge from the ground
*September 16, 2014*

**math**

w ww.pitt.edu/~medart/image/glossary/rise.jpg This should help
*September 16, 2014*

**Math**

3*4=12 3=number of colors she can choose 4=number of colors to pick from
*September 16, 2014*

**Algebra**

Your answer is correct just make sure you put "{}" instead of parentheses
*September 16, 2014*

**math**

beginning ratio 5:7 Girls=30 Boys=42 ending ration 3:4 Boys=48 48/4=12 12*3=36 Girls=6 36-30=6 6 more girls joined
*September 16, 2014*

**maths**

What is the question?
*September 16, 2014*

**6th Grade Math**

Yes A is correct For B just find if 4 bags will give you 3 more pounds since you already have 10. To do this multiply (5/8) by 4 to see how many pounds it will give you. (5/8)*4=2.5 Four more bags Will Not cover the extra soil needed.
*September 16, 2014*

**math**

a=72 b=84 c=99
*September 16, 2014*

**Math**

3(y-3)=2y-9+y Distribute the 3 3y-9=2y-9+y Combine the like terms that are on the right side "2y" and "y" 3y-9=3y-9 You can stop right here because the equations are the same on both sides. This tells you that no matter what y is it will be equal on both ...
*September 16, 2014*

**Math**

2x-6=2x Subtract 2x from both sides in order to get your x variables on 1 side 2x-6=2x -2x -2x What you do to one side you must also do to the other. This leaves you with -6=0x Because it says 0x there is no solution
*September 16, 2014*

**Math**

Okay you first step is first when you multiply it you will get 2x-6=2x After this you are trying to get x by itself. What would you do?
*September 16, 2014*

**Math**

Can you show me how you came up with that answer? I like to see a person's though process. It helps me to assist you better.
*September 16, 2014*

**Coordinate Algebra**

You can replace y with h since it says an equation for the flower's height "h". The equation is still the same though
*September 16, 2014*

**Coordinate Algebra**

y=1.5x+7 1.5x = represents how much the seedling grows in x amount of weeks 7 = is the height before it was planted. It is constant. It is also your y-intercept because the equation is in y=mx+b form in which b is the y-intercept
*September 16, 2014*

**Coordinate Algebra**

The simplest to approach this problem would be to find the distance between the first x and y values. 6-(-2)=? Use the number found and subtract it from your second y value "9" 9-?=?? You subtract because the x value is less than the y value as shown in the ...
*September 16, 2014*

**math**

12:(12+15+9) 12=number of action dvds (12+15+9)= total number of dvds Did I help you get started?
*September 15, 2014*

**math**

4 and 6 6-4=2 6^2-4^2 36-16=20
*September 15, 2014*

**math**

Is the problem asking to consider both how many miles driven and how many gallons of gas purchased to find the total cost?
*September 15, 2014*

**Algebra1**

You're welcome :)
*September 15, 2014*

**Algebra1**

I was adding 9 to both side in order to solve for x. What you do to one side you must also do to the other.
*September 15, 2014*

**Algebra1**

-3x-9=-3x-8 +9 +9 ↓ -3x = -3x+1 +3x +3x 0x≠1 No Solution Do you see how I got this?
*September 15, 2014*

**Algebra1**

You should have gotten this when you multiplied -3x-9=-3x-8
*September 15, 2014*

**Algebra1**

Then you solve for x
*September 15, 2014*

**Algebra1**

First distribute the -3 into(x+3) and he -3 into(x+1)
*September 15, 2014*

**Math (Ms. Sue! Anyone!)**

Okay so add -14.8+22.6=?
*September 15, 2014*

**Math (Ms. Sue! Anyone!)**

Let's start with the first question if it says the temperature increase what does that tell you to do? (add,subtract,multiply, or divide)
*September 15, 2014*

**Physics**

acceleration=force/mass
*September 15, 2014*

**Math Problem (please help)**

okay so what did you get for our answers?
*September 15, 2014*

**Math Problem (please help)**

(x-7)^2 shouldnt be x=7 because you have the squared
*September 15, 2014*

**Math Problem (please help)**

Okay well the problem is set to make it easy for you. Since it is broken up into factors all you have to do is set each one equal to 0. x+3=0 (x-7)^2=0 Solve for x.
*September 15, 2014*

**Math Problem (please help)**

is the (x-7) squared?
*September 15, 2014*

**Math-PLEASE help me**

2.78-(-2.78)=5.56 You are not trying to find the distance from 0. That is what the absolute value is. It tells that the absolute value is 2.78. You want the total distance between -2.78 and 2.78. You found this to be 5.56 To check your answer you would add -2.78 +5.56=2.78 Did...
*September 15, 2014*

**Math-PLEASE help me**

Depending which way you're looking from 2.78 to -2.78 would be -5.56 because you are moving down(left) the number line And -2.78 to 2.78 would be 5.56 because you're moving up(right) the number line. It might be simpler just to leave it positive. But your math was ...
*September 15, 2014*

**Math-PLEASE help me**

The absolute value is given and it tells you that the original number is negative. So the original number is -2.78 All you have to do is find the distance between -2.78 and 2.78
*September 15, 2014*

**math, algebra**

In order for 1/ab to be positive meaning it is greater the zero the denominator must be positive since the numerator is positive. Since both a and b are in the denominator to get a positive number a&b both have to be positive or they both have to be negative. Did I explain ...
*September 15, 2014*

**math, algebra**

I think you posted this question already but Ill answer again. In order for 1/ab to be positive meaning it is greater the zero the denominator must be positive since the numerator is positive. Since both a and b are in the denominator to get a positive number a&b both have to ...
*September 15, 2014*

**math, algebra**

*by
*September 15, 2014*

**math, algebra**

it would be positive when a is a negative number A negative divided b a negative is positive.
*September 15, 2014*

**algibra1**

You could use the guess and check method
*September 15, 2014*

**Pre-Calculus/Trigonometry**

in y=mx+b form y=y value m=slope x=x value b= y-intercept
*September 15, 2014*

**Pre-Calculus/Trigonometry**

The equation they gave you is in slope intercept form and you already know the slopes are the same. You just need to know the slope of the given equation.
*September 15, 2014*

**Pre-Calculus/Trigonometry**

You have the name of the form write but that equation is point slope form Slope intercept form is y=mx+b
*September 15, 2014*

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