Wednesday

December 17, 2014

December 17, 2014

Total # Posts: 2,171

**Trig Proofs**

Thanks so much for the help=)
*April 27, 2009*

**Trig Proofs**

Please Help: please solve this proof: cosx- cosy = -2sin(x+y/2)sin(x-y/2)
*April 27, 2009*

**algebra**

-2x7= -3 +t+24 -14= =3+t+24 -11= t+24 -35= t
*April 27, 2009*

**Algebra**

Can someone please check my work for me. Q: Plot the graph of the equations 2x - 3y = 5 and 4x - 6y = 21 and interpret the result. A: 6(2x ¨C 3y = 5) = 12x ¨C 18y = 30 3(4x - 6y = 21) = 12x - 18y = 63 12x ¨C 18y = 30 + 12x - 18y = 63 0 ¡Ù 93
*April 26, 2009*

**Algebra**

would it be correct to say that the equations are not independent therefore they have an infinite solution set.
*April 25, 2009*

**Algebra**

so can you tell me if this is correct.... 4x – 5y = 14 -12x + 15y = -42 15(4x – 5y = 14) = 60x – 75y = 210 5(-12x +15y = -42) = -60x + 75y = -210 60x – 75y = 210 + -60x + 75y = -210 = 0 The equations are not independent therefore they have an infinite ...
*April 25, 2009*

**Algebra**

with the first one was i suppose to multiply it by -3? i multiplied the first equiation by 15 and the second by -5. does it matter?
*April 25, 2009*

**Algebra**

what about this one? I'm having a tough time with this one as well... Solve by substitution or elimination method: -2x + 6y = 19 10x – 30y = -15
*April 25, 2009*

**Algebra**

Solve by substitution or elimination method: 4x – 5y = 14 -12x + 15y = -42 when i try this solution i end up cancelling out the whole problem. can someone please help me!
*April 25, 2009*

**Trigonometry**

A painter needs to cover a triangular region 62 meters by 68 meters by 70 meters. A can of paint covers 70 square meters. How many cans will be needed?
*April 24, 2009*

**math (ruler)**

I need help finding the mesurment in a ruler the little bitty mark could you pull up a ruler for me with all the marks .
*April 22, 2009*

**math**

would it be 30
*April 22, 2009*

**math**

round to the nearest ten dollars, then estimate the answer/ $73.88=---dollars +29.04----dollars ------------------ Total-----dollars
*April 22, 2009*

**math**

how would you create an equation for sec(2x) using both sec(x) and csc(x)? the steps i have so far are 1/(cos^2(x)-sin^2(x)) = 1/(1-1)/(sec^2(x)-csc^2(x)) but then i do not know what to do after this.
*April 19, 2009*

**math**

how would you determine a formula for cot(2x) using only cot(x)? Thenhow would you determine a formula for sec(2x) using only sec(x)?
*April 19, 2009*

**math**

when you are determining a formula for cot(2x) using only tan(x) would the formula be...(1-tan^2(x))/(2tan(x))?
*April 19, 2009*

**math**

when 2 lines intersect and form an acute angle A and both lines have a positive x-intercepts but the y-intercepts are on opposite sides of the origin. How would you write an equation showing the relationship between A and the angles that the normals make with the positive x-axis?
*April 18, 2009*

**Science**

If the density of ice is 0.92 g/cm^3, what percent of an ice cube’s (or iceberg’s) mass is above water.
*April 15, 2009*

**physical science**

An object in the shape of a cube has a mass of 375 grams and a side that measure 5.0 cm. Will this object float in water? Prove your answer by comparing the density of the cube to that of water.
*April 15, 2009*

**math**

if you have the triangle ABC with the points A(47,100) B(-1273,203) and C(971,-732) how would you find the center point and the radius of the incircle of triangle ABC?
*April 15, 2009*

**math**

if you have the triangle ABC with the points A(47,100) B(-1273,203) and C(971,-732) how would you find the center and the radius of the incircle of triangle ABC?
*April 13, 2009*

**sociology**

the gradual transition from monarchy topolitical democracy during the last half of the second millennium stimulated a corresponding transition from imperial rule by the power of the sword to imperial rule by the pwoer of money.
*April 13, 2009*

**math**

how would you factor (5(x+2)^4)+(3x(x+2)^3)-(2x(x+2)^2). I have so far gotten it down to 2(3x^4+25x^3+74x^2+92x+40) but i'm not sure that i am doing this right.
*April 5, 2009*

**Algebra**

Ella is twice Bella's age, and Stella is three times Bella's age. The difference between Stella's and Bella's ages is 8 yrs. How old is each girl?
*April 5, 2009*

**Algebra**

THANKS!
*April 3, 2009*

**Algebra**

So no 1 goes above that? as in 1 ------- 2^2*7^8?
*April 3, 2009*

**Algebra**

Simplify (2^-1∙7^-4)^-2 Is it 1/2^2*7^8 OR simply just 2^2*7^8
*April 3, 2009*

**Algebra**

Thanks for your help :)
*April 3, 2009*

**Algebra**

Is it the same thing? I don't know, but my first choice was A. I still do not understand how (p-4+m p2m)-4 / (p-4)-m = (p-4+3m)-4 / p4m = p^16-12m / p^4m where does the 12 fit in? and how does the answer end up as A? = p16-16m
*April 3, 2009*

**Algebra**

Ok but the answer is typed incorectly choice A is p^-16+16 not = p^16-16m
*April 3, 2009*

**Algebra**

Where did you get 3m from? The problem reads Simplify (p^-4+m p^2m)^-4 ---------------- (p^-4)^-m Theses are the choices A) p-16m + 16 B) p-8m – 4 C) p-11m – 4 D) p-3m + 16 I say its A or B
*April 3, 2009*

**Algebra**

Thank you for all your help! :)
*April 3, 2009*

**Algebra**

What about breaking the fractions a part like this? 5x -2 - 3y -1 = 5 - 3 ----------------- x -1 + y -1 ------- x^2 y --------------------- 1 + 1 ------------ x y = 5y+3x^2 * x^2 y -------- x+y x^2 y(5y+3x) = 5xy^2 + 3x^2 y
*April 3, 2009*

**math**

how would you find an equation to a line that is parallel and 3 units away from the line x-5y+10=0?
*April 3, 2009*

**science**

what are three fresh water resources and what are three ocean water resources?
*April 2, 2009*

**Environmental Science**

What are three fresh water resources and three ocean water resources
*April 2, 2009*

**Algebra**

Why would it be this because a*a is 2a? I thought at first it is a^2? Can you please explain, thanks!
*April 2, 2009*

**Algebra**

a*a = a^2? yes? No? Or is it (m + 4) (2a – 2)
*April 2, 2009*

**Algebra**

Factor (m + 4) (a – 5) + (m + 4) (a + 3) I am pretty sure its this but want to double check! Thanks! (m + 4) (a^2 – 2)
*April 2, 2009*

**Algebra**

There is no division necessary here? So the final answer is what is @ the bottom? (5x^-1)-3 (-2+1=-1, and -1+1=0)
*April 2, 2009*

**medical information management and office practice**

Explain the difference between qualitative and quantitative medical record analysis.
*March 31, 2009*

**math**

how would you prove that (cos^2x-sin^2x)(1-cos^2xsin^2x)= (cos^6-sin^6)?
*March 30, 2009*

**math/slope-intercept form**

2x+y=5
*March 28, 2009*

**Pre-Cal**

Perform the operation and write the result in standard form. (2-3i)(5i) over 2+3i Please help!! I do not understand this.
*March 25, 2009*

**Pre-Cal**

Perform the addition or subtraction and write the result in standard form. (8+sqrt -18) - (4+3sqrt2i) I know that you have to subtract 8 from 4 but I do not know what to do after this.
*March 25, 2009*

**7th grade reading**

I know this was already answered,but the child would be possessive if she does not share her toys. It is the synomem for "overprotective"
*March 24, 2009*

**3rd grade reading/spelling**

What does it mean to adjust and monitor reading speed?
*March 24, 2009*

**math**

from a base elevation of 8500 ft, a mountain peak in colorado rises to a summit elevation of 14595 ft over a horizontal distance of 15842 ft. find the grade of the peak.
*March 22, 2009*

**Physics**

As the distance between an object and the center of the Earth is increased 1)the object's mass decreases and its weight remains the same. 2)both the object's mass and its weight remain the same 3)both the object's mass and its weight decreases. 4)the object's ...
*March 19, 2009*

**grammar**

Suboridiante clauses: What is the subordinate clause in the sentence: May the dreams you dream today be tomorrow's dreams come true.
*March 19, 2009*

**Marine Science**

What happens to the majority of water at the poles and at the equator? My answer was that at the poles the water gets cold and at the equator the water gets hot but my teacher said this was wrong. Please help!
*March 18, 2009*

**ethics**

that president of mix race will save your dumb butt you probably voted for bush didnt you that why america is in the shape it is in now because of people like you get a clue
*March 16, 2009*

**ethics**

i dont understand what they mean when they said my i dont understand i got everything except the ast question.
*March 16, 2009*

**ethics**

I need help i just dont understand it can someone PLEASE help me!!!!!!!!!
*March 16, 2009*

**ethics**

Write a 200-300 word summary that answers the following questions: what information about race and ethnicity in the united states has helped you better understand or relate to specific minority groups?, Have you learned something new about your own cutural history?, trends in...
*March 16, 2009*

**statics**

16. The Roper Organization conducted identical surveys in 1990 and 2000. One question asked women was, “Are most men basically kind, gentle, and thoughtful?” The 1990 survey revealed that, of the 3,000 women surveyed, 2,010 said that they were. In 2000, 1,530 of the ...
*March 15, 2009*

**Physics**

Jessica's weight is 540 newtons. According to the Third Law, if the Earth pulls on Jessica with a force of 540 N, then Jessica pulls on the Earth with a force of 540 newtons that acts in the opposite direction. However, if Jessica stumbles while rollerblading, she will ...
*March 15, 2009*

**discrete math**

what is the link between matricies and graph theory
*March 14, 2009*

**Parametric curves and area**

1.The curve of x=49-t^2 and y=t^3-1*t makes a loop which lies along the x-axis. What is the total area inside the loop? 2.Find the area of the region enclosed by the parametric equation: x=t^3-7*t and y=4*t^2.
*March 10, 2009*

**Calculus-Modeling Equations**

An unknown radioactive element decays into non-radioactive substances. In 420 days the radioactivity of a sample decreases by 39 percent. 1.What is the half-life of the element? 2.How long will it take for a sample of 100 mg to decay to 46 mg?
*March 6, 2009*

**Chemistry**

How many moles of KMn)4 are required to reach with the moles of Na2C2O4 in the last problem? and also, if the KmnO4 of the last problem is in 30.30mL of solution what is the molarity (M) of the KmnO4 solution?
*March 3, 2009*

**Chemistry**

how many moles of Na2C2O4 are there in 25.00 mL of a .7654 M solution of sodium oxalate?
*March 3, 2009*

**Chemistry**

thank you. so what did you get as a final answer for this problem then? and what did u do after doing 2.2=2PHN3 and after subsituting the partial pressure?? Thanks
*March 2, 2009*

**Chemistry**

How do you solve this: Consider the decomposition of ammonium chloride at a cerain temperature NH4Cl(s) <- NH3(g) + HCl(g) -> Calculate the equilibrium constant Kp if the total pressure is 2.2 atm at that temperature.
*March 2, 2009*

**geometry**

how do you do linear measure and precision
*February 26, 2009*

**4th grade english**

Earlier this year, our class ______ a greenhouse. (visit) Would the correct form be has visited
*February 22, 2009*

**Accounting**

Hello, I am taking an accounting class and the questions states "post to the accounts and keep a running bakance for each account" the question gives a page number to refer to but it does not provide any guidance. What does these means?? Thanks
*February 22, 2009*

**Math**

Determine whether the function is one-to-one. If it is, find itd inverse. f(x)= 3x+4 over 5
*February 19, 2009*

**Math**

Use a graphing utility to approximate (to two-decimal-place accuracy) any relative minimum or maximum values of the function. y=x^3 - 6x^2 + 15 My answer was (4,12) for min and(0,-12) for max.
*February 18, 2009*

**Math**

5x-6(-5x + 2) = 16
*February 18, 2009*

**mechanics**

An object has a mass of 120 kg on the moon. What is the force of gravity acting on the object on the moon?
*February 5, 2009*

**Algebra**

input =9 output = 2 what is the function. input = 27 output = 8 what is the function. input = 42 output = 13 what is the function input = 3 output = 0 what is the function.
*February 1, 2009*

**Algebra**

input function output 9
*February 1, 2009*

**Algebra**

Can someone help me with this one? Find all numbers for which the rational expression is undefined. 6/4w+5 Thanks
*February 1, 2009*

**6th grade_Science/Math**

Thank you Francis! I didn't get it. :)
*January 27, 2009*

**Is this imagery?**

Is this a metaphor or imagery? "The ground is wet, and smells of smoke; it feels soft and spongy to his touch."
*January 27, 2009*

**Is this imagery?**

He hooks an arm around his son's neck and is at once caught in a fierce embrace. He smooths the dark head wedged against his shoulder, brushes the hair aside at the back of his neck to touch bare skin.
*January 27, 2009*

**Algerbra**

Thank you for your help, it is width. So i take the 2and times it by the 27. With that answer figure out the difference between the 2 times 27 and minus from 100 then divid by 2. Is this the way to figure out the problem?
*January 25, 2009*

**Algerbra**

Can anyone help me on these two problems also. I am getting so confused and tired. The length of a rectangle is fixed at 27cm. What lengths will make the perimeter greater than 100cm? also this problem Trians A and B are traveling in the same direction on parellel tracks. ...
*January 25, 2009*

**Algerbra**

I have a couple of problems that i am stuck on. They are word problem. 1 Soybean meal is 12% protien; cornmeal is 6% protien. How many pounds of each should be mixed together on order tyo get 280 pounds of mixture that is 11% protien? How many pounds of the cornmeal should be ...
*January 25, 2009*

**math**

Mr. Cline needs 36 ice cubes for the science experiment. Eack ice tray makes 12 ice cubes. If he makes 4 ice trays, does he have enough ice cubes? Can you use an estimate to solve? Explain.
*January 21, 2009*

**College math**

A planehas 7 hrs. to reach a target and come back to base. it flies out to the target at 480 miles per hr. and returns on the same route at 640 miles per hour. how many miles from the base is the target?
*January 20, 2009*

**8th Grade Algebra: Answer Check #2**

can u hlep me
*January 20, 2009*

**8th Grade Algebra: Answer Check #2**

y=x2+-24
*January 20, 2009*

**Algerbra**

One day a store sold 35 sweatshirts. White ones cost $9.95 and yellow cost $12.50. In all, $389.05 worth of sweatshirts were sold. How many of each color were sold? How many white sweatshirt were sold? How many yellow sweatshirt were sold? I can not figure out how to do this ...
*January 16, 2009*

**Algebra**

The base of a triangle is 8cm greater than the height. The area is 42cm^2. Find the height and length of the base.
*January 14, 2009*

**4th grade**

what volume of helium would be in a balloon the size of a 2liter soft drink?
*January 11, 2009*

**spelling**

thro?
*January 7, 2009*

**Math**

josh that is the right answer by kimberly and I think you go to my school write back josh
*January 6, 2009*

**Math**

math is kinded of hard for me but I try my best in math and please solve my math problem and see if its right sinccer kim and 1 think can you spell sinccer please thank you very much anybody and sue
*January 6, 2009*

**Math**

5*5*5*5*5<40 than you do 5*14<70+4<74 5^2< 7
*January 6, 2009*

**math**

livly tempo kimberly
*January 6, 2009*

**healthcare**

what ethical issues might arise by relying more and more on technology in Health Care or Human Service? As you answer,consider ethical issues from a consumer’s perspective and from a Health Care or Human Service worker’s perspective.
*January 6, 2009*

**physics**

drwls is correct, except change everything labeled in FEET to METERS since the original problem is in meters.
*January 4, 2009*

**public health**

Review this artile: Hutt, J. & Wallis, LA. (2004). Injuries caused by airbags: a review. Trauma, 6, 271-278 and answer following: How did the researchers use the literature to explain a public health phenomena? How was the literature used to show the necessity for the research...
*December 25, 2008*

**adult education**

Review this artile Hutt, J. & Wallis, LA. (2004). Injuries caused by airbags: a review. Trauma, 6, 271-278 and answer. • How did the researchers use the literature to explain a public health phenomena? • How was the literature used to show the necessity for the ...
*December 25, 2008*

**Math**

let f(x)= x+3/x-11 and let the domain of the function be the set of all intergres except 11. Find the function values f(9)=
*December 12, 2008*

**Math**

Write the first five terms of the sequence whose nth term is -7n-4.
*December 12, 2008*

**MATH FOR TEACHERS**

Would you please explain further I am lost?
*December 11, 2008*

**MATH FOR TEACHERS**

Write 75.42 in fractional notation.
*December 11, 2008*

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