Thursday

July 31, 2014

July 31, 2014

Total # Posts: 145

**calculus 1**

oh wait nvm i see what i did wrong

**calculus 1**

shouldn't it be 1 * (x-3)^2 + 2x(x-3)^1 ? instead of 2x(x-3) * 1 at the end?

**calculus 1**

differentiate x(x-3)^2 do I product and chain rule?

**calculus**

r(1+i)^-1 + r(1+i) ^-2 + r(1+i)^3 +...+ r(1+i)^-(n-1) + r(1+i)^-n r(1+i)^-n [ (1+i)^(n-1) + (1+i)^(n-2) + .. + (1+i)^2 + (1+i)^1 + 1] how did you get the (1+i)^2? and why isnt there a (1+i)^ n+3?

**calculus**

oh yea i did forget the r in my first sum thank you reiny i think i get it now

**calculus**

im assuming you replaced (1+i) with u right if so i thinki kinda get

**calculus**

1) equation; sum= (1-(1+i)^-n / i 2) equation; sum= r(1+i)^-1 + r(1+i) ^-2 + r(1+i)^3 +...+ r(1+i)^-(n-1) + r(1+i)^-n im suppose to simplify second equation into the first one but im messing up somewhere if anyone can tell me the first 3-4 steps i think i can get it from there...

**m**

stop spamming the same question like 10 times

**maths**

im not going to do it but ill give you a hint you need common denominators to add or subtract fraction so figure out what you need to do to both fractions to get same denominator

**Math: Check Answers**

i didnt check number 4 but the others should be right

**Math: Check Answers**

im sorry i didnt see the bottom part i take that back

**Math: Check Answers**

you hvae math check answers on the title but you didnt even pick answers you jsut asking us to do your homework for you

**physic**

equation F = mv^2/r i dont understand why velocity is squared can anyone explain. this is waves on string

**physic**

equation F = mv^2/r i dont get why the velocity is squared can anyone explain? this is waves on strings

**equation inequality and graph**

imma assume you want us to just solve for x?

**Math**

1/20

**Word problem**

just take 247 and divide it by 33 the answer is 8 i rounded it up beause the actual answer was 7.48

**Word problem**

same as apple problem just take your total number of ticket(22) and divide it by the number of ticket it takes to ride roller coaster(3) you can ride it 7 times and have 1 ticket left

**math**

10

**math**

PEMDAS parenthesis, exponent, multiply, divide, add, subtract (these are the order of operation follow them in that order like bosnan did) he multiply the parenthesis by whats nexxt to it first and then added and subtract everything

**math**

bring y to the other side on first equation so that you will have x= y + 4 and substitute y + 4 for x in second equation 3(y+4) - 5 = 2 and solve 3y + 12 - 5 = 2 3y +7 = 2 3y= -5 y= -5/3 plug the answer for y into either equation and solve

**physics**

what is your question

**math**

multiply everything in parenthesis by the number next to it -4p - 20p +30 = 22 -7 + 14p add common terms together -24p + 30 = 15 + 14p add 24p to both side 30= 15 + 38p - 15 from both side 15= 38p divide 38 from both side 15/38 = p

**algebra**

does the (1) and (2) mean your saying that is equation 1 and 2 ? if so this is what you do since equation 2 has x isolated already just plug 8 - 2y into x of equation 1 to solve for y and then plug the answer you get into either equation for x

**Algebra**

so 8.26 would be 82600000. those wouldnt be o's though i just dont know hwat the number is

**Algebra**

the 10^7 means you move the decimal 7 places to the right

**math**

thsi is how i would do it lets say equation 1 will be -7x + 5y = -56 and equation 2 is -21x - 2y = -168 nothign can cancel out if you llok at the equation so what i would do is multiply equation 1 by a negative 3 that way the -7x becomes a positive 21x to cancel out(but you ha...

**geometry**

this would be algebra not geometry and you just combine like terms like you would when you add any old numbers 5=3x + 1 subtract 1 from both side 4=3x divide by 3 from both side x=4/3

**ENG102**

the velocity for this is a little trickier you have to figure out your final position and how far you are from your starting point and divide that by the time

**ENG102**

for your speed just add your total distance traveled (26 + 14 +15 + 17) and divide that by 2 hours

**ENG102**

average speed formula is total distance divided by total time average velocity formula is total displacement over time the two may seem like the same thing but they arent velocity is a vector so direction has to be taken into account (for example say you start at an inital pos...

**homework dumping**

that's the only one im doing for you cause you are clearly homework dumping

**physics-14**

you have to convert to celsius first and then you can convert to kelvin c=(f - 32) times 5/9 (70-32) times 5/9 that is 21.1 degree celsius kelvin= celsius + 273.15 k= 21.1 + 273.15 k=294.26 degrees

**math**

i mean 1619 pages

**math**

21/100=340/x 21x=34000 x=1620

**Algebra/%%$#!!!**

oh by the way since a=1/4 that means a > o meaning graph opens upward and the vertex point f(-7)=7 is a minimum point

**Algebra/%%$#!!!**

sorry i didnt see that for some reason on your other post lol k i would rewrite this first equation a bit so it is in vertex form vertex form is written like this : f(x)=a(x-h)^2 + k to rewrite it in this form it will look like this f(x)= a(x-(-7))^2 +7 a = 1/4 k= 7 h=-7 verte...

**math**

and it depends on which variable you want but im sure you can figure it out from here

**math**

times everything in parenthesis by 8 giving you 2x - 8x - 8y = y - x combine like terms -6x - 8y = y - x add x to both side -5x - 8y= y -y from both side -5x -9y=0

**Math**

take (9/5) multiply it against (x/100) to get 180% and then move over 2 decimal place to the left to get oyur answer

**math**

its factor is (x -8 and x-24) set equal to zero and solve for x

**math**

multiply x - 16 by itself (x-16)(x-16) x^2 -32x + 256 = 64 subtract 64 from both side x^2 - 32x +192=0 factor or use quadratic formula

**Math**

2.25 all you do to turn a percentage into decimal is mnove decimal 2 places to the left

**Math**

2.4

**trig**

yea what reiny said

**Math Word problems (3rd Grade)**

what that means is that they want each bouquet have the exact same number of roses in them, and that each bouquet has to have the exact same amount of lilies ( like bouquet 1 cant have 2 roses when bouquets 2 only has 1, bouquet 1 cant have 6 lilies when bouquet 2 has 2 lilies)

**Math Word problems (3rd Grade)**

9 roses and 6 lilies all i did was divide both number by 8 to figure out how many of each will go in each bouquet

**math**

there many way to do this i liek to change it all to improper fraction first 2 3/18= 39/18 ; 5 3/12= 63/12 ; 4 2/4= 18/4 so you have: (39/18) + (63/12) - (18/4) and then follow order of operation PEMDAS(remember you need common denominator to add or subtract fractions)

**math**

205/902 - 22/902 = 183/902 902 is the common denominator not 22 this is how i got it there is no number that goes evenly into 22 and 41( without a decimal being left) so i multiply (5/22) by (41/41) and (1/41) by (22/22)

**math**

you have to get a common denominator to add or subtract fractions

**Algebra/%%$#!!!**

oh wait correction i read it wrong you have it right sorry

**Algebra/%%$#!!!**

6x^9 -36x^2 -35x^7 + 30 is what you should have gotten second equation using foil

**Algebra 2**

is the equaton suppose to look like this (x/2x) + 1 + 1/4 = (2/2x) + 1 ? if it is then what you do is simplify ffirst (x/2x) = 1/2 cause x cancel (1/2) + 1 +(1/4) = (2/2x) + 1 and (2/2x) =(1/x) (1/2) + 1 + (1/4) = (1/x) + 1 1 + (3/4) = (1/x) + 1 subtract 1 from both side (3/4)...

**trig**

tan = -10 sqrt2/ -10 sqrt 2 becomes tan=1 which is 45degree

**Math**

d(t)= 12 so you have 12= 12 + 3t -t^2 minus 12 from both side 0= -t^2 + 3t factor to get (-t +3 and t + 0) put them equal to zero and solve for t= 0 and 3 your answer is 3 because zero seconds mean no distance

**math aig**

first find out exactly how much of each you have with simply ratio cross multiplication (x/48)=((5/12) 240= 12x divide by 12 gives you x = 20 (x is blue marbles) (1/2)= (y/48) 2y= 48 y= 24 so he has 4 more yellows

**Math :(**

im assuming its just a regular number cube with 6 numbers there are only 2 odd numbers above 1 ( 3 and 5) so the ratio is 2/6 you want to know how manny times (x) will you roll those numbers out of 78 roll the ratio is x/78 multiply (2/6) = (x/78) cross multply to give you 6x=...

**math**

(35%/100%) times (x/850) cross multiply 29750 = 100x divide by 100 x= 297.5 x is the number times he will reach base

**math**

first put it in slope intercept form y=mx +b m is the slope and b will give you the y intercept y-9 = -2(x-8) multiply everyting in the parenthesis by -2 y-9= -2x + 16 and then plus 9 from both side y= -2x + 25 your slope is -2

**2nd grade math**

dont just solve for him show him how he can do it joei you know you want 4/6 of 18 so lets say x is the number that you are searchign for x/18 = 4/6 cross multiply, meaning x times 6 and 4 tiems 18 giving you 6x= 72 and then divide by 6 on both side so 6x divide by 6 is x becu...

**Math**

first figure out the difference between the numbers in x for x they go up by 2 s we know we have 2x plug in any of the x number from above (lets do 2) 2 times 2 is 4 but in the above number sequence you gave us the y number that correspond to x=4 is 5 so we need to add 1 to ge...

**math**

(9/10) = (x/80) cross multiply 10x=720 divide by 10 x=72

**computers**

this is a homework help site something we wont be able to help you with something like this

**math**

just substitute 3a-2 for b in the equation 8a + b 8a + 3a -2 combine your like terms to get 11a - 2 and that's your answer if you want a jsut set it equal to zero

**math**

i hope that helps if your confuse about anything with the above solution just ask and ill try to clarify

**math**

okay just equation 1 has b= a - 4 we can plug in a- 4 for b in equation 2 to give you; 2a - 3(a - 4) = -2 2a - 3a +4= -2 -a + 4 = -2 -a = -6 divide by negative 1 to make a postive a= 6 now you can plug in 6 into either equation to solve for b but i would use equation 1 since i...

**algebra**

just wanted to point out that miss sue multiply the (9/11) by 12 and the (5/12) by 11 to get a common denominator so you can subtract the two fractions just incase your wondering what she did

**Mathematics**

volume=1/2*length*width*height put in the numbers into the equation and just get length by itself to solve for it and the bases is the width

**algebra**

Psydag is corret but he messed up a little when you multiply right side by 2 you would have gotten -4y = 3 + 8y - 12 not -4y = 3 + 4y - 12 so you would have subtracted 8y instead of 4y from both side giving you -12y= -9 and imma leave you to take it from here

**help help helpppp--math**

are you saying for one you are trying to prove that cot theta = 1/tan theta? if so (imma change theta to x so it doesnt become a mess of words) cotx becomes cos x/ sin x so you have (cosx/sinx)= 1/tan x mutiply both side by tan x giving you (tanx) times (cosx/sinx)=1 tan x bec...

**ALGEBRA**

factor it our use quadratic formula (i would do both so you get practicce in both sicne some polynomial are factorable so oyu will have to know how to use wuad formula) this isn't factorable so use quad formula which is -b + or - square root of (b^2 - 4AC) all of that will...

**ALGEBRA**

imma teach you how i learn to factor tak the x^2 and multiply it with the 20 giving you 20x^2 now figure out all the numbers that multiply to equal 20 which should be 4 and 4, and 1 and 20 now out of those 2 choices which one adds up to equal 9 (bc there is a 9x) the answer is...

**math**

6a +54 all you had to do was multiply everything in parenthesis by the 6 so 6 times a is 6a, and 6 times 9 is 54 giving you the above answer

**math**

i got 17.05% you might have put in one of thenumbers wrong check again

**math**

yes

**math**

its okay i jsut wanted to make sure i had your question right

**math**

are you saying everything is like this 0.5x^3 + 0.4^3 - 0.1^3 ? if so just do it like simple adding and subtracting .5+.4 is 0.9x^3 -0.1^3 that becomes 0.8x^3 when adding or subtracting variables with exponent keep all exponent the same

**Pre-Calc/Math**

no problem lol this one almost had me stump for alittle

**Pre-Calc/Math**

1) rewrite cosx (cosx/sinx) + sinx = csc x 2) cosx^2/sinx + sinx = csc x 3) multiply sinx by (sinx/sinx) to get same denominator this gives you cosx^2/sinx + sinx^2/sinx = cscx 4) combine your fractions (cosx^2 + sinx^2)/sinx = cscx 5) rewrite numerator 1/sinx= csc x and there...

**Math**

use the quadratic formula(look it up yourself)

**Math**

if so then just use foil or box technique to multiply (3x -1) against itself to get 9x^2 -6x +1 = 2 subtract 2 from both side to get 9x^2 - 6x -1 = 0 and then use quadratic formula to solve for x because i dont think you can factor this unless missing something

**Math**

are you asking to solve for (3x -1 ) squared= 2 ?

**Science**

Force=mass time acceleration newton second law force= 50 N, acceleration equal 2 m/s^2 we want the mass on a side note N(newton and its units are kg m/s^2, im giving oyu this so you can see how the units will cancel out and give you only weight units for the mass so you know y...

**homework dumping**

stop homework dumping

**math**

did you forget to put in other info?

**math**

you dont need our help with this just read it real slow and write on paper

**Grade 8 Math**

for number 1 its 5x-6=69 not 6-5xy=69 because 6 is being subtracted from the number not the number is being subtracted from 6 and its not xy cause its only 1 number

**Algrbra 1**

if you square it you get d^2 +14d+49 but that is redundant because when you factor its just d+7 still so just take d+7 and set it equal to zero and d=-7

**high school diploma**

i think it would sound better if you change it to A lifelong memory many of us share is the moment we obtained a driver's license

**algebra**

i mean to say for x intercept make y equal zero (0= 3x^2 +9x-1)

**algebra**

the x intercept is when the line crosses the x axis(y will be zero) and same thing for y(except it crosses the y axis and x = 0) make for x intercept make y (0=3x^2 + 9x -1) and then factor or use quadratic formula(you can look up the formula if you dont know) the y intercept ...

**Homework**

and label the subject next time posting a question so others know what you need help with

**Homework**

i already answer this but you can pretty do this problem if you read the question carefully it gives you exactly everything you need.

**Algebra**

you can do this yourself you have the formula jsut plug in all the numbers you have into correct area

**homework dump**

dont homework dump

**math**

exactly what did you want ?

**Algebra 1**

shouldn't have answer such a basic question for her it feels like she not even trying by posting something this simple

**algebra 2**

stop homework dumping

**Algebra**

bring the 64 over so you have y^2 - 20y + 36 im not sure if you can factor this so jsut use quadratic formula