mathhelper

(90x^22y^17−108x^17y^11+90x^16y^4)/−9x^5y^2 my answer is : -(2x^11y^2)(5x^6y^13-6xy^7+5) but it says it can be simplified more? how much more can you simplify?!

6 years ago

To the person signing in as "mathhelper" to the question posted by miller. Stop using my name, I have used that name now for several months. There should be a method to stop duplications of names.

4 years ago

What are the potential benefits of knowing the identities of individuals providing answers or assistance in online platforms or forums?

2 years ago

find the integral of x(lnx) from 1 to 5

2 years ago

Why are there no longer any students asking questions ? All the questions appear canned questions, very short and meaningless, that no student would ever ask. Of course the responses are also canned

2 years ago

Number 1 is correct but I have to agree with bobpursley. Look at number two really closely and if you have to, use a calculator to help you!

9 years ago

it is correct

6 years ago

hypo: x one leg: x-2 other leg: (1/6)(x-2+x) = x/3 + 1/3 (x-2)^2 + (x/3 + 1/3)^2 = x^2 x^2-4x+4 + x^2/9 - 2x/9 + 1/9 = x^2 x^2/9 - 4x - 2x/9 + 37/9 = 0 multiply each term by 9 x^2 - 36x - 2x + 37 = 0 x^2 - 38x + 37 = 0 finish it up, it factors. Make sure...

4 years ago

He is short by 5 2/3 - 3 3/4 = 17/3 - 15/4 gallons = 23/12 gallons = about 1.9 gallons I would say he needs 2 gallons

4 years ago

... with a positive index (one index, several indices) x^2/y^-2 = x^2y^2 or (xy)^2

4 years ago

aren't you just adding 5/8 + 3/10 ? Your common denominator will be 40 or, since the answers are all estimates ... 5.8 = .625 3/10 = .3 , so we have .925 , almost 1

4 years ago

restate your question after fixing the typos /7 and -/3 make no sense to me

4 years ago

x(t) = e ^ t - 2t x(3) = e^3 - 6 x(1) = e - 2 avg speed = (e^3 - 6 - e + 2)/(3-1) = (e^3 - e - 4)/2 ft/s x'(t) = e^t - 2 x'(1) = e - 2 = about .72 ft/s looks like it is moving to the right moving to the right when e^t - 2 > 0 e^t > 2 , let's take ln of bo...

4 years ago

–(6)–1 = -6 - 1 = -7 none of the choices are correct. If you meant -(6)(-1) , then it would be -6

4 years ago

Using the definitions .... a+2d = -9 a+7d = 26 subtract them: 5d = 35 d = 7 and a = -23 Now you can find any term in the sequence and should be able to answer c) and d)

4 years ago

Sounds like gibberish

4 years ago

term(12) = a + 11d you are given the values of a and d, just plug them in

4 years ago

4 pies take 28 apples, so 1 pie takes 7 apples, then 20 pies take ..... or just solve for a in the simple proportion: a/20 = 28/4

4 years ago

How about g(x) = 2x+1 and f(x) = x^3

4 years ago

profit per share = 75-58 = $17 How many shares are involved? Don't forget the $630 brokerage fee, which is a liability

4 years ago

First answer has money/time with time/money, that doesn't match up You should expect to see something like oldmoney/oldtime = newmoney/newtime 54/3 = money/7 cross multiply 3*money = 7*54 any of the given ratios which results in 3*money = 7*54 will be cor...

4 years ago

-4 > x > 7

4 years ago

One way to read this: wouldn't the new sheet be 4.5 by 7 ?? Your wording is not clear, one could think you are cutting 2 by 2 squares at each corner. Then the paper is no longer a rectangle, and your area = (8.5)(11) - 4(2)^2 square inches.

4 years ago

Area of your trapezoid = (21)(21+7)/2 Your wording is confusing

4 years ago

orange fish/blue fish = 3/5 you are given the value of "blue fish", so plug it in and solve. I'll wait for your answer so I can check it

4 years ago

I just googles "how to do long division" and got all kinds of results. One is www.youtube.com/watch?v=LGqBQrUYua4&ab_channel=mathantics try it

4 years ago

k(x) = 5x − 8 and p(x) = x − 4, solve k[p(x)] "solve" is not the correct instruction here, should say "find" k[p(x)] = k[x-4] = 5(x-4) - 8 = .....

4 years ago

#1, makes no sense, what is the question? Of Anonymous' answers, only the last one is correct Why don't you show your work so somebody can check it?

4 years ago

If originally Jason had x flags, then Tina had 4x/9 flags Jason lost 21 flags so he has x-21 left 4x/9 = 2(x-21) 2x/9 = x-21 2x = 9x - 189 189 = 7x x = 27 almost done, what did I find?

4 years ago

She sure did

4 years ago

No figure above, but probably the typical problem where 32/26 = 6/x 32x= 6*26 etc

4 years ago

PsyDAG gave you the correct answer. Surely you can multiply 1/3 by 3/4.

4 years ago

let the sides be 6x, 8x, and 10x then 6x+8x+10x = 120 x = 5 The shortest side is 6x = 6(5) = 30 (in effect that is what R_scott did) btw, did you notice that the triangle is right-angled ?

4 years ago

let the equation be amount = 1(1/2)^(t/k) , where k is the half-life, and t is number of hours so (1 - .067) = 1(1/2)^(8.6/k) logging it ... log .933 = log (1/2)^(8.6/k) 8.6/k = log .933 / log .5 solve for k, your answer to half-life

4 years ago

16.399999999999 ????? , really? A = 16.4(.5)^(t/34) you want A = 2 2 = 16.4(.5)^(t/34) , where t is in days 2/16.4 = .5^(t/34) log (1/8.2) = (t/34)log(.5) see if you can get t = 103.21 days

4 years ago

starting value ...... x money spent at store #1 = x/2 + 20 after first store, amount left = x - (x/2+20) = x/2 - 20 amount spent at second store = (1/2)(x/2 - 20) + 10 = x/4 amount left = x/2 - 20 - x/4 = x/4 - 20 third store she spent (1/2)(x/4 - 20) + 2...

4 years ago

I agree with your monthly payment, mine was 2169.40 , no big deal 2. The wording is confusing. Do you want the outstanding balance of the loan after 12 years? Seems like the only logical thing to find balance = 340000(1.003833333)^144 - 2169.33(1.00383333...

4 years ago

Solve: 3(x+11) = 45

4 years ago

28 minutes : 2 lawns = x minutes : 5 lawns x/5 = 28/2 solve for x

4 years ago

let the parts be 3x and 5x 3x+5x=6400 x = 800 so 3x = 2400 and 5x = 4000 check it out , 2400+4000 = 6400 2400 : 4000 = 3(800) : 5(800) = 3 : 5

4 years ago

let Aaron's present age be x his father is 9x One year ago, Aaron was x-1 dad was 9x-1 9x-1 = 11(x-1) + 2 etc let us know what answer you got

4 years ago

Let me take a wild guess, 30 ???

4 years ago

Neil, when I went to school, 42,000 + 30,000 used to come out as 72,000 So yes, he can live comfortably without even touching his 1.2 million retirement fund.

4 years ago

741,908 is approx. 740,000 to the nearest ten-thousand 909,854 is approx. 910,000 The difference between 91 and 74 is 17 So my estimate for the difference is approx 170,000 to the nearest ten-thousand

4 years ago

that would be 2*2*2 or ....... different outfits

4 years ago

cost = 15 + 10(h-1) , with h standing for hours 45 = 15 + 10(h - 1) Just solve this for h

4 years ago

Let the radius of the can be r and its height be h V = π r^2 h 10 = πr^2h or h = 10/(πr^2) For your least dimension, the surface area (SA) has to be a minimum SA = 2πr^2 + 2πrh = 2πr^2 + 2πr(10/πr^2) = 2πr^2 + 20/r D(SA)/dr = 4πr - 20/r^2 = 0 for a minimu...

4 years ago

The new plane must have a direction vectors of <1,-1,1> and <1,1,-1> (I suspect that your meant x+y-z=6 for your second plane equation) Therefore the normal of the new plane is the cross-product of those two. That normal would be <0,1,1> So your new plane...

4 years ago

It would help if you had a question. I will take a wild guess you want the number of people. there are 6*3 or 18 pieces of pizza each person gets 2 pieces, so what is 18 ÷ 2 ????

4 years ago

50 km/h = 50000 m/3600 second = 129/5 m/s = 25.8 m/s 129/5 = 5/s 129s = 25 s = 25/129 seconds or approx .2 seconds brace yourself, you are going to hit it Your second question makes no sense. Whoever made it up is poor in geography. Buffalo is in the US,...

4 years ago

The sum of the first 5 terms is 162 gives us a(r^5 - 1)/(r-1) = 162 the 8th term is 4374 gives us ar^7 = 4374 divide the 2nd by the 1st ... (ar^7) ÷ (a(r^5 - 1)/(r-1)) = 4374/162 = 27 r^7(r - 1)/(r^5 - 1) = 27 r^8 - r^7 = 27r^5 - 27 r^8 - r^7 - 27r^5 + 27...

4 years ago

Comparing how easy this question is vs the other one you posted, my suspicion that you had a typo in your other post stands. Here: Since you are using the term "common difference" we can assume that your series is arithmetic. a + 5d = 24, and d = 4, so a...

4 years ago

I was going to work along those lines, but I followed his wording. Made me work a bit harder, lol

4 years ago

probab(red, then blue) = 3/15 * 5/14 = 15/210 = 1/14

4 years ago

avg speed = total distance/total time = 30 km/ 3 hours = 10 km/h

4 years ago

Tim is 10 Amy is (4/5)(10) = 8 mom is (4.25)(8) = 34

4 years ago

$91/14 = $6.50 None of the answer choices are correct !

4 years ago

4.9t^2 = 15 t^2 = 15/4.9 t = √(15/4.9) = 1.75 sec

4 years ago

geeesh, distance = rate * time, so what is 21(2.5) ??

4 years ago

if distance = rate * time, then time = distance/rate you know both numbers, go for it

4 years ago

What a lot of nonsense, what does the perimeter have to do with the size of the angles ? Let's just find the largest angle using the cosine law: (the largest angle will be opposite the largest side) 12 inches, 15 inches, and 8 15^2 = 12^2 + 8^2 - 2(12)(8)...

4 years ago

Wouldn't greater than 4 in 5 choosings just be all 5 ?? so what is (1/5)^5 ?

4 years ago

Looks like you don't have the rate of interest.

4 years ago

Probab = (8/46)(7/45) = 28/1035

4 years ago

choices for 1st vertical stripe = 13 choices for 2nd vertical stripe = 12 number of possible setups = (13)(12) = 156

4 years ago

growth in one week = .5 cm rate of growth in that week = .5/2 = .25 f(t) = 2(1 + .25)^t, where t is in days f(t) = 2(1.25)^t check: when t = 1, f(1) = 2(1.25) = 2.5 cm after 4 weeks, f(4) = 2(1.25)^4 = 4.88 cm Of course t will have to have some logical up...

4 years ago

1) To find the x of the midpoint, add the x values of the endpoints, then divide by 2 To find the y of the midpoint, add the yx values of the endpoints, then divide by 2 for the 1st segment, the x of the midpoint is (-2+0)/2 = -1 the y of the midpoint is...

4 years ago

I assume you meant the interior angles, each one will be 14*180/16 ° or you know each exterior angle will be 360°/16 or 22.5° so each interior angle will be 180-22.5 or ...

4 years ago

let's try x = 6.01 and x = 6 f(6.01) = 367.6022 f(6) = 366 f′(6)≈ (367.6022 - 366)/(6.01-6) ≈ 160.22 actual answer: f'(x) = 3x^2 + 8x + 4 f'(6) = 216 + 48 + 4 = 160 trying something like x = 6.0001 will bring us much closer to 160, after all, we got calcu...

4 years ago

I you are using a^2 + b^2 = c^2, where c is the hypotenuse, then c clearly must be largest side. So tell me what you think?

4 years ago

Your previous 5 questions are all basically the same. I will do this one, you do the others. Let's assume that we have a right-angled triangle, then 22 must be the hypotenuse, and 16^ + 15^2 = 22^2 but 16^ + 15^2 = 481 and 22^2 =484 , so we DON'T have a r...

4 years ago

1.81.7x makes no sense

4 years ago

x/35 = 8/21 21x = 35*8 x = 35*8/21 = .....?....

4 years ago

It must be a multiple of 28 between 50 and 60 1*28 = 28 2*28 = 56 3*28 = 84 So what are your thoughts on this?

4 years ago

So they can afford .25(75000) or $18750 per year, or approx. $1562 per month. present value = 1562(1 - 1.0035^-360)/.0035 = ????

4 years ago

Old square ..... x by x new square .... 2x by x+5 2x(x+5) = 48 expand, re-arrange, then solve this quadratic

4 years ago

alternate way: f(x) = ax^2 + bx + 9 f(-3) = 9a - 3b + 9 = 0 , 3a - b = -3 f(1) = a + b = -9 add, 4a = -12 a = -3, mentally get b = -6

4 years ago

1000 e^(.055t) = 2000 e^(.055t) = 2 take the ln of both sides .055t lne = ln 2, but ln e = 1 solve for t

4 years ago

C + 13 = 57 solve for C

4 years ago

sold by Sarah ---- 3x sold by Clay --- 2x 3x-2x = 10 x = 10 total sold = 5x = 50

4 years ago

a * b = a + b + ab 5 * ( - 2 ) = 5 + (-2) + (5)(-2) = -7 If e is the identity element the e*b = b but e*b = e + b + eb It follows that e + b + eb = b e + eb = 0 e(1 + b) = 0 e = 0 or b = -1 check: 0*15 = 0 + 15 + 0(15) = 15 7*-1 = 7 - 1 -7 = -1 Since clea...

4 years ago

Make your diagram to see that you have a right-angled triangle with a base angle of 30° and opposite side of 20 m. you want the adjacent, so clearly the tangent ratio is needed tan 30° = 20/x x = 20/tan30° = ??? m

4 years ago

looks like we are missing the interest rate

4 years ago

x + 4x = 30 solve for x

4 years ago

3,A,B,192 are a GP a = 3 and by definition: ar^3 = 192 3r^3 = 192 r^3 = 64 r = 4 your GP is 3, 12, 48, 192

4 years ago

No obvious pattern, but the difference between first and second is -10 the difference between the 2nd and third is -21 the difference between the 3rd and the 2nd is -11 the difference between the 4th and the 3rd is -10 we could "force" a pattern on the nu...

4 years ago

Using your data in the definitions of AP ... a+7d + a+8d = 72 2a + 15d = 72 a + 3d = -6 a = -6 - 15d sub that into the first equation: 2(-6-15d) + 15d = 72 -12 -30d + 15d = 72 -15d = 84 d = -84/15

4 years ago

To sweep the series a team must have won 4 straight games. Since the prob of a win is 1/2 the prob of sweep = (1/2)^4 = 1/16 then prob of NOT sweeping the series = 15/16 odds in favor of a sweep = 1 : 15 To go the full 7 games, the outcomes must be WWWWLL...

4 years ago

prob of getting 15 of 20 correct = C(20,15) (1/2)^20 = 15504/1048576 = .014785.. So what is your conclusion?

4 years ago

I guess you didn't like my answer the last time www.jiskha.com/questions/1852036/two-teams-are-playing-in-a-best-of-seven-playoff-series-the-first-team-to-win-four-games

4 years ago

6log(x+4)=log64 , initial condition: x > -4 log ( (x+4)^6 ) = log 64 (x+4)^6 = 64 take 6th root of both sides x+4 = ± 2 x = -6 or x = -2 but x > -6, so .... x = -2

4 years ago

amount invested in mutual fund at 9% : x amount invested at 10% : 4800-x interest from the mutual fund = .09x interest from other account = .10(4800-x) .10(4800-x) - .09x = 43 multiply by 100 100(4800-x) - 9x = 4300 solve for x

4 years ago

What is this? 3(√729)(7) ?? then ... = 3(27)(7) = 567 (either use brackets or the * symbol to show multiplication)

4 years ago

From your description, the crate should be 42 by 24 by 30 Volume = length x width x height. So what is its volume ?

4 years ago

let the prob of picking a Twix be p, then (.71)(p) = .47 p = .47/.71 = 47/71 = approx. .6619.. or about 66%

4 years ago

let the sides be 3x, 7x, and 5x. Then 3x+7x+5x = 90 solve for x, sub into my definitions for the longest side.

4 years ago

(sec θ)/(csc θ) = (1/cos θ)(1/sin θ) , but we know sin 2A = 2sinAcosA = 1/(sinθcosθ) = 2/sin(2θ)

4 years ago

Present value of her affordable value = 400(1 - 1.005^-60)/.005 = ... Don't forget to add the $2000 downpayment she already has

4 years ago

I hope one of your choices is the obvious 7/15 or its equivalent.

4 years ago

What is 25*(3/5) ?

4 years ago

Every business should try very hard to "Mackenzie the revenue" LOL R = x(-1/3x + 44) = (-1/3)x^2 + 44x this is a parabola, its max is the R value of its vertex for the x of the vertex, -44/(-2/3) = 66 so 66 items must be sold to obtain the "MACKENZIE" and...

4 years ago

Speed of kayaker in still water : x mph speed of current : y mph time to upstream = 12/(x-y) time to go downstream = 12/(x+y) 12/(x-y) = 3 3x - 3y = 12 x - y = 4 , #1 12/(x+y) = 2 2x + 2y = 12 x + y = 6, #2 add #1 and #2, 2x = 10 pick it up from here

4 years ago

This is usually stated to be "what is the probability of AT LEAST 2 out of 23 people having the same birthday?" = 1 - prob(all have different birthday dates) Start with any student, the prob that he will have a birthday that year = 365/365 = 1 then the pr...

4 years ago

obvious first equation: x + y = 30 amount of liquid fertilizer we have : .2x + .05y = .1(30) by 100: 20x + 5y = 300 4x + y = 60 so we have: x + y = 30 4x + y = 60 continue from here, looks straight forward from here, comes out nicely

4 years ago

Oliver : Will = 4 : 3 or 4x : 3x but 4x = 32 so x = .... then 4x+3x = .....

4 years ago