# b^2-22b+57 I am not sure but I got b(b-22)+57 Looks right to me. No, the answer should be: b^2-22b+57 = (b - 3)*(b - 19)

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### algebra- please help me factor

b^2-22b+57 I am not sure but I got b(b-22)+57 Looks right to me. No, the answer should be: b^2-22b+57 = (b - 3)*(b - 19)

### english 22

Pronoun case for who and whom 22a. To who should we send the letter of commendation? 22b. To whom should we send the letter of commendation? My answer is: 22b

### math

Question solve 6^4-7x^2+2=0 MY ANSWER I get 28b^13+b^2+22b+26 over 4b+3 but I do not understand how this can be the solution for x

### Vectors

if a=3x+2y and b=5x-4y, find x and y in terms of a and b What I did: 2a=6x+4y +b=5x-4y --------- 2a+b=x 2(3x+2y)+(5x-4y)=x 6x+4y+5x-4y=x 11x=x 11x dvided by x = 11 ...that isn't the correct answer. The correct answer (according to text book) is x=2/11a+1/11b y=5/22a-3/22b I'm ...

### chemistry

1) Starting with 75.00 g of 1-propanol and 75.00 g of PCl 3. Calculate the theoretical yield of 1-chloropropane. 3CH3CH2CH2OH + PCl 3 --> 3CH3CH2CH2Cl + H3PO3 Answer in terms of grams. the answer that i got is 98.12, is this right and how many sig figs should it be? 2) What...

### math

Alex buys a magazine for $8 and some candy bars for $2 each. He spendss a total of $22. Which equation would you use tofin how many candy bars (b) Alex bought? a. 8-2b=22 b. 2-22b=8 c. 22-8b=2 d. 8+2b=22

### math,correction

is this correct: solve: 5(x-2)^2=3 My answer: (10 +/- sqrt 15)/(5) looks like you expanded, then used the formula and you got the right answer properly reduced. I think you are getting this!!! I don't want to confuse you but I would have done the following: (x-2)^2 = 3/5 x-2...

### Math

Half of a pizza was broccoli and half was mushroom. George ate 2/3 of the broccoli and 1/4 of thee mushroom part. How much of the pizza did he eat? I did this problem but I wasn't sure of my answer so I needed someone to see if I am right or not. My answer is 1/6 and I got ...

### Calculus AB

I'm trying to find the second derivative of h(x)= x^2 + cos(kx) My answer for h'(x) is 2x - ksin(kx) but I'm not sure if that's right. Then the answer I got for h''(x) was h''(x) = 2 - k^2cos(kx) but I'm pretty sure that's wrong based on the graph I was given. Is my answer for...

### pre-algebra

write an inequality with the same meaning as -5 ¡Ý y would that be -5 ¡Ý 5 ?? This looks like greek to me. my sign changed when I posted my question, I had -5 is equal to or greater than Y my answer was Y= -4 but i think i got it now it should be Y= -11 not -4 right ? -5 &...

### math

Perform each operation, convert to a fraction, & then convert your answer back to a mix number. -4(7/8)x 3(2/3) I did 8*-4+7/8 & got -25/8 then 3*3+2/3 & got 11/3 then i multiplied -25/8* 11/3 & got -275/34 but it's not the right answer, the answer is -17(7/8) not sure what I'...

### Trigonometary

I'm using the sin formula. I've got w over 1.2 and I'm not sure whether I should multiply it out by 1.2 or by w? The formula looks like this sin20 = w/1.2

### Pre-calculus

I want to make sure this is right. the inverse of f(x)=(-3x+2)/(2x-1) I got f^-1(x)=(x-2)/(2x-3). if its right how do i check the answer to see if it is right. also would the domain of f be D=all real numbers except 1/2. And I do not know how to get the range for f^-1

### science

Suppose a rocket ship in deep space moves with constant acceleration equal to 9.8m/s^2., which gives the illusion of normal gravity duing flight. a)If it starts from rest, how long will it take to acquire a speed one-tenth that of light, which travels at 3.0x 10^8 m/s? b) How ...

### physics

At a construction site, a brick fell and hit the ground at 24m/s a) from what height did the brick fall? b) how long was it falling? for a) i got 29.387m and for b) I got 2.448s I got a) by using v^2=v0^2 +2a(x-x0) for b) I used v=v0+at Did I do this problem correctly? If we ...

### Calculus

Evaluate lim x->0 (Sin^3 3x - 3x^3/x^3 x^4) I got zero (0) to be my answer by imputing 0 in place of x but am not so sure if the answer should be 0, am thinking it should be like 1/0 or something like that.

### MATH

A sphere has five times the volume of a right cone that has a radius of 4.6 cm and a height of 7.7 cm. Determine the radius of the sphere to the tenth of a centimetre. This question is multiple choice and these were the options: A. 2.2cm B. 3.4cm C. 5.9cm D. 9.3cm I was sure ...

### check math

Here are my answers. Can you check if I got the right answers? Thank you! Solve for z: 4x+10yx=0 z=-2x/5y y^2+3yz-8z-4x=0 z=(-y^2+4x)/(3y-8) there was no z in your first equation, from you answer I can tell it should have been 4x + 10yz = 0 If so, the answer is right. last one...

### Math please check

I think I have the right answer, but I am not 100% sure how to do the values at (1,-1) and the one below at (0,-1, 1). Please explain how I need to approach how to do these. Thank You! Calculate the partial derivative @f/@x, @f/@y and @f/@x | (1,-1), and @f/@y | (1,-1) f(x,y...

### Algebra

I distributed 3x^2+x-10=f(x) to find the zeroes. My book's answer was (3x-5)(x+2). When I distributed this to make sure I got the original function, I got 3x^2-x-10. Is this still an acceptable way to factor it even though the x is negative instead of positive as it should be...

### math

derivatives: y=(x^3+1)^2, then dy/dx is: i got 6x^2(x^3+1) first but im not sure. Can i see the steps of how it is done right. I also got 2(3x^2+1), which one is right?? sorry for bugging.Thanks

### calculus

I am trying to find equation of the tangent line to the curve 2/(1-3x) at x=0 using the definition. I applied it into the formula lim h->0 [f(a+h) - f(a)]/h which gave me [2/(1-3x+h) - 2/(1-3x)]/h I took the conjugate and came with [4/(1-3x+h)^2 - 4/(1-3x)^2] / h(2/(1-3x+h...

### Algebra

Can someone please help me with these algebra problems? The directions are: Solve the equation or formula for the indicated variable. m=ax+bx for x 8=mx+ax-2 for x ax+bx-3=4 for x Anything is helpful! Thanks. For m=ax+bx for x you would use the distributive property to get m=(...

### Math

Jason has 20 coins that are only dimes and quarters. The total value is $2.75. How many of these are quarters? I tried answering it but I got 5 quarters. I'm not so sure if that's the right answer. Can you show me the equation and the right answer to see if I'm correct? Thanks!

### English

Find the student who looks sad. Find a student who looks sad. (Which one is correct and common?) How does Junsu look? He looks sad. Do you know why? Yes, I do. He got 100 points in English. He got 60 points in math. He got the best points in

### Algebra

You want to buy 8 books for $19.68 each, estimate the total cost show your work. I did 19.68 x 8 and got 157.44 then rounded the answer and got 157 am I right? Or The second time I tried I estimated 19.68 and got 20 so then I did 20 x 8 and got 160 Is this right?

### chem

Can someone please help me balance this equation? CH3OH + O2 ===> CO2 + H20 Thank you! CH3OH + O2 ===> CO2 + H2O To balance the H, put a two on the right. CH3OH + O2 ===> CO2 + 2H20 H and C are now balanced. O is balanced. Too easy. Are you sure that's right? We got ...

### math

A roof rises 9.75 ft over a horizontal distance of 15.84ft. What is the slope of the roof to the nearest hundredth? I am not sure if i am using the right fomula. i used the slope rise/run therefore i got : 0.6155303 and when rounded to the hundreadths place i get 0.62 is the ...

### Calculus

Find the equation of the tangent plane at the given point. 1)x^2+y^2-z=1 at the point (1,3,9) 2)x^2*y^2+z-40=0 at x=2, y=3 3) x^2+ln(xy)+z=6 at point (4,0.25,2) For the first one I got the partial fraction in terms of x, y and z and my final answer was -2x+6y-z+2. I don't know...

### Stats: Joint Density Function

Let the joint density function of X and Ybe given by: f(x)={kxy^2 for 0<x<y<1 (0 otherwise what is the value of k? Can someone please help me with this? The formula I used was: ))kxy^2 dx dy (where )) is double integration both from 0 to 1). I worked it out (I think) ...

### Algebra 1B

I can not figure out the answer to this problem. (^6)(-7^6+5) I'm not sure if that sign is correct. It's suppose to be the symbol that looks like a check mark and goes over the 6 on left and over the 6+5 on right. Please help

### mixed #'s

Find n. n+n=8 1/2 what does n =??? n+n = 2n <~~right? Therefore, you should be able to rephrase it this way: 2n = 8 1/2 Now divide each side by 2, and you'll have your answer. Yes?? I'll ask a math teacher to double-check my thoughts. =) 2 n = 8 1/2 n = 8 1/2 divided by 2 ...

### Calculus Please Help

I think I have the right answer, but I am not 100% sure how to do the values at (1,-1) and the one below at (0,-1, 1). Please explain how I need to approach how to do these. Thank You! Calculate the partial derivative @f/@x, @f/@y and @f/@x | (1,-1), and @f/@y | (1,-1) f(x,y...

### medical codding and billing

Can someone plesae help me. I need to to answer these four quetions. I got something, but I'm not sure if Igot it right. The questions are, How can eliminating abbreviations reduce errors?. Should written policies be developed for abbreviation usage? If yes, what should the ...

### medical coding & billing

Can someone plesae help me. I need to to answer these four quetions. I got something, but I'm not sure if Igot it right. The questions are, How can eliminating abbreviations reduce errors?. Should written policies be developed for abbreviation usage? If yes, what should the ...

### Algebra2

I got this answer for a problem, and I'm not sure if it's right. Can someone tell me if I'm correct? 1.(2+4i / 3-i) = 6/7+5/7i

### Calculus

Determine whether or not each of the following functions is invertible. Give your reasons for believing the function is invertible or not. Please check this for me. I am not sure if I am adequately explaining my answer and if my answer is right. a) y= log10(1 + 1/x) y'= ((1/(1...

### Algebra 2

What is three root 1/3 ? I'm not sure if that looks right in words, but I don't know how to post the square root symbol. If that doesn't make sense, then pretend that this sign: % is a square root: 3 %1/3 The 3 looks like it's a little above it. Please help me. It's Radical ...

### Algebra 2

What is three root 1/3 ? I'm not sure if that looks right in words, but I don't know how to post the square root symbol. If that doesn't make sense, then pretend that this sign: % is a square root: 3 %1/3 The 3 looks like it's a little above it. Please help me. It's Radical ...

### Math add subtract fractions

Can you check my answers: 2) 5/8 - 1/4 i got: 3/8 4) 1 1/2 - 2 4/5 i got: 7/10 6) 5 7/8 + 3 5/12 i got: 9 7/24 10) 3 1/2 + 2 2/5 i got: 5 9/10 18) 6 7/12 + 4 5/12 i got: 11 20) 7 9/10 + 3 3/10 i got: 11 1/5 22) 18 3/8 + 11 6/7 i got: 30 13/56 24) 26 9/10 + 72 5/6 i got: 99 11/...

### algebra

Solve for s in this equation. Depreciation. D=C-s/n This is my answer D-C=C-s/n-c D-C=-s/n -n(D-C)=-s/n*(-n) -nD+nC=s s=n(C-D) Please chack to see if this is correct Looks fine to me. A slightly shorter (by 2 lines) rearragement is: D=C-s/n D+s/n=C s/n=C-D s=n(C-D) but hey, ...

### chemistry-check answer

What is the wavelength (in nanometers) of light emitted from a hydrogen atom when an electron falls from the n = 2 to n = 1 orbital? I got this answer and i wanted to make sure it is right 121.7 Thank you

### math

how do you write an equation and state what the variable n represnts. 54 -n- =24 If you're writing an equation where you need to state what the variable is, then you need to end up with an equation where n is the only thing on one side of the equal sign. Take your equation: I ...

### Algebra

I'm studying for a test so I want to make sure I'm doing these problems right. Numerator (-5a exponent -2) Denominator b3 All to the -1 exponent For a= -4. And b=2 My answer I get is 1/10 is the right ? -16 with -1/2 exponent Would the answer be -4? 2-3 square root of 14 Would...

### math

g(x)= 1-2x-3, x< or equal to 0. x-18, x>6 find g(6). so I used the first equation. 1/2(6)-3 and I got 0, but that's not the right answer so I'm not sure what I'm doing wrong.

### algebra

Can you help see if I am arriving at the right answers? 1. F(x) =5x^2-2x F (0), I got o F (-1) I got 7 F (2) I got 16 2. -0.4x<-16 I got x>40 3. 8x-(5x+7) =14 My answer: 7/3 4. -19<=3x-8<=-7 My answer: -11/3<=x<=3

### Chemistry

What will be the pH of an aqueous solution containing 0.040 mol/L sodium hydroxide?? I got 1.40 or 1.398 I rounded the numbers is my answer right??? If not what's the right answer?? I know I wrote the question again, because on the previous answer I did not understand what u ...

### Algebra

Write an equation for the translation so the graph has the given vertex. 1. y=-|x| vertex (-5,0) 2. y=2|x| vertex (-4,3) 3. y=-|x| vertex (p,q) I really have no idea how to even begin these, but I do know the answer to # 2 is y=2|x|+11 and #3 is y=-|x-p|+q Thanks in advance. ...

### writing skills

Do your homework before applying for any job. If you rewrote sentence 5 beginning with Be sure that you the next words should be 1 got done your homework 2 got your homework done 3 had done your homework 4 did your homework 5 have done your homework answer 5

### chemisrty

what is the balanced equation for thereaction of aluminum selenide with water including the physical states reactants and products im given hydrogen selenide prepared by reacting aluminum selenide with water other product solid aluminum hydroxide please can you help minnie: ...

### Algebra

I have a few questions that I am not too sure about, could you please check them. Thanks! 1. Find the union {2,3} U {2,4,8} This is what I got : {2,4,8,3} 2. State the name of the property illustrated: (6+3) +(1+16)=(1+16)+(6+3) I got commutative property of addition 3....

### MATH

i need to write each expression as a product of the same factor: * = multiply can you check these please a^2 i got a*a 19^3 i got 19*19*19 -6^2 i got 6*6*-1 -x^3 i got x*x*x*-1 (-5)^4 i got (-5)*(-5)*(-5)*(-5)*(-5) 4^3 i got 4*4*4 -(10)^2 im not sure how to do?? 20^1 i got ...

### math exponents

i need to write each expression as a product of the same factor: * = multiply can you check these please a^2 i got a*a 19^3 i got 19*19*19 -6^2 i got 6*6*-1 -x^3 i got x*x*x*-1 (-5)^4 i got (-5)*(-5)*(-5)*(-5)*(-5) 4^3 i got 4*4*4 -(10)^2 im not sure how to do?? 20^1 i got ...

### Chemistry 1

What answer should be reported, with the correct number of significant figures, for the following calculation: (965.43 x 3.91) + 9413.4136 I got 13189 as an answer. Can someone let me know if this is right?

### Chemistry 1

What answer should be reported, with the correct number of significant figures, for the following calculation: (965.43 x 3.91) + 9413.4136 I got 13189 as an answer. Can someone let me know if this is right?

### Math

I had this equivalent equation question from earlier and I'm not sure if I got the right answer. 1/4x > 1 (the > is underlined so it's greater than or equal to) is it x > 4 or x > 1/4 or ??

### AP Calculus

Find (dy/dx) for the following implicitly defined function: cos(x-2y) = 3y for the answer, i got.. dy/dx = (-sin(x-2y)) / (3-2sin(x-2y)) but i'm not sure if it's right..

### Physics

A truck travels beneath an airplane that is moving 100 km/h at an angle of 49 degrees to the ground. A) how fast must the truck travel to stay beneath the airplane? Answer in units of km/h The answer I got was 65.6 km/h, but i just wanted to make sure someone else got the same...

### math

Ex 3: 4x-7<2x+5 4x-7-2x<2x-2x+5 2x-7<5 2x-7+7<5+7 2x<12 2x/2<12/2 x< 6 Note I did not switch the order of the inequality here since I divided by a positive number. Multiplying or dividing by a positive number does not change the order of the inequality. So...

### maths

I'm not sure if I got this right because the answer I got is €5.00\€6.25 So the question is: Eugene spent half his money in one shop and half of what was left in another shop. He then had €1.25. How much had he in the beginning

### Math

If a famlies total living expenses are 63,000 a year. After the death of the insured, the total family income would be 55,000. How much life insurance is required to cover the dependents icome shortfall, if prevailing interest rate 4%. I am not sure that the answer I came up ...

### meaning

"before you start pointing fingers.. make sure your hands are clean" i'm having trouble defining this quote or explaining it. can you help me?. i think it means before you judge someone you should make sure your actions aren't worse then theirs. uh, not sure. please & thank ...

### Physics

On a mass of 100 kg, a force of 120 N acts right and at an angle of 30 degrees to the horizontal. If the coefficient of sliding friction is .1 what is the acceleration of the mass? 100N* cos30 -(100sin30+mg)(.1)= m*acceleration [86.6025- [(-50 + (100)(-9.8)](.1)]/100 [86.6025...

### Chemistry II

1. Under water where the temperature is 17oC and the pressure is 394 kPa, a diver inhales 2.1 L of air from his SCUBA tank. a) How many moles of gas are in his lungs? b) If the diver swims to the surface without exhaling where the temperature is 32oC and the pressure changes ...

### Math

I'm trying to perform the indicated operations, and reduce to lowest terms, but I'm not sure if I got the correct answer. The question is y-5/(x^2+5x)+(xy+5y) + 1/x+y - 2/x+5....I got y-6, but am not sure if that is correct.

### maths

Eugene spent half his money in one shop and half of what was left in another shop. He then had€1.25. How much had he in the beginning. I am not sure if I got it right so O got €5.00\€6.25. So please do show your rough work and answer. Thank You! :D

### math

Generalize this to fine a formula for the integral: sin(ax)cos(bx)dx Could someone tell me what they got for an answer so I can check it to see if my answer is right. My answer: -1/2sinasinbx^2-1/3acosaxcosbx^3+ integral 1/3 a^2cosbx^3sinax..I'm not sure hot to find the ...

### Maths

Check my answer please? Not sure if I did this right. Let y = f(x) be a cubic polynomial with leading coefficient a = 2 and f(-2) = f(1) = f(2) = 0. find the factored form of f. I got: f(x) = 2(x + 2)(x - 1)(x - 2)

### Math

How to solve this (2x+5)/(x+1) > (x+1)/(x-1) and graph? I tried this and got (x+3)(x-2) and got -3<x>2 which isn't right the right answer is x<-3 or -1<x<1 or x>2 How would I get this? I asked this before.

### Calc

Can this be factored: 6/5x^1/5 - 12/5x^-4/5 I am trying to find the values for X which will make this equal to zero. My factoring looks like this but not sure it is right 6/5x^1/5(1-2x^-1) so I get X= 0 and X=2

### math

thanks for the explanation of limit, but i want someone to help check out this problem for me lim x->3 (x^2 - x - 12)/ (x - 3) i got 5 as the answer okay, so i cant use substitution. i factor the (x^2 - x - 12) and got (x - 4) and (x + 3) [(x - 4)(x + 3)]/ (x - 3) i cant ...

### chemistry

Its 5:23pm Ive just checked to see if I've gotten a response,looks like mine has been skipped over. I see questions that were asked after mine and the one right before mine. I never got an answer. What's up?!

### Math

8-i/2+3i write complex # in standard form. I know to FOIL, not sure if I did it right, I got -13/4-9i then I'm not sure what to do next or if I'm done...so lost can anyone help me?

### CALC

(sqrt(9x+5)-sqrt(68))/(x-7) limit as x approaches 7 the answer i got was .0546 i am not sure if this is right also, if it is ...is there a more exact fraction .... like if the answer was 0.3333333 a better way to write it would be 1/3

### CALC

(sqrt(9x+5)-sqrt(68))/(x-7) limit as x approaches 7 the answer i got was .0546 i am not sure if this is right also, if it is ...is there a more exact fraction .... like if the answer was 0.3333333 a better way to write it would be 1/3

### Math

Hi, would someone mind just checking the answer I got for this formula and tell me if I'm on the right track or not. Question... x+y=21 3x=4y Answer I got... x=84 y= -63 I didn't get that. Check your math. I found 7y=63 but not y = 63. You can always check your answer. Is 4X...

### Just a repost, in case the old isnt seen

sorry! I never noticed..the mass should be 52000kg sorry about that! For Further Reading physics repost - Alexis, Sunday, October 14, 2007 at 6:07pm so it should be a 52000kg train slows from 25 m/s to 14m/s in 5.0 s. Calculate the work done on the train. so I found the ...

### Calculus Verification

I just want to make sure im right. Find the derivative if y= arcsec(x+3). I got 1 ======================= |x+3|sqrt(x+3)^(2)-1 Is this the final answer or do you need to solve (x+3)^2 and get (x^(2) + 9x + 9)

### college math

solve: (3/x)/1=(7/x-20) i keep getting different answers for this question. the last answer i got was 20 (which would make it not a solution) but im not sure if that is right

### Physics

An ion beam has a cross-sectional of 2.5 mm^2 and the charge delivered by it to a target can be expressed as q(t)=(.12 C/s^3)t^3 + (.24 C/s^2)t^2 - .45 C. Calculate the current density in the beam at t = 3.0 seconds. I used an integral from 0 to 3s. and got 3.24C, then I ...

### Calculus

For each value of h, evaluate the following function. Round your answer to four decimal places. lim h->0 (4+3)^(3)-64/h A) h=0.01 B) h=0.001 C) h=0.0001 D) h=-0.01 E) h=-0.001 F) h=-0.0001 For A I got 48.9 For B I got 48.99 For C I got 48.999 For D I got 47.9 For E I got 47...

### Calculus

For each value of h, evaluate the following function. Round your answer to four decimal places. lim h->0 (4+h)^(3)-64/h A) h=0.01 B) h=0.001 C) h=0.0001 D) h=-0.01 E) h=-0.001 F) h=-0.0001 For A I got 48.9 For B I got 48.99 For C I got 48.999 For D I got 47.9 For E I got 47...

### Chemistry

To prepare a 400 mL solution of .7500 M NaC2H3O2, how many grams of NaC2H3O2 would be needed? I am wondering if I set this up, I got an answer of .0435 g NaC2H3O2. But i'm not sure if that is right? Is that the correct answer?

### Math Ms.Sue Please!!

Harriet needs to ship a small vase. The box she will use has a volume of 216 cubic inches. If the side lengths are all the same, what is the length of each side of the box? I got 6 inches. Im not sure how i even got this answer...is it right?

### Physics

An ion beam has a cross-sectional of 2.5 mm^2 and the charge delivered by it to a target can be expressed as q(t)=(.12 C/s^3)t^3 + (.24 C/s^2)t^2 - .45 C. Calculate the current density in the beam at t = 3.0 seconds. I used an integral from 0 to 3s. and got 3.24C, then I ...

### math

[(x-9)/(x^2-9)]-[(1)/(x+3)] I got (6-x)/(x+3) for answer. [(2)/(y-3)]+[£¨4£©/(3-y)] I got (-2)/(y-3) for answer. I'm not sure about the answers, please check them for me and correct me! THANKS A LOT!

### math

[(x-9)/(x^2-9)]-[(1)/(x+3)] I got (6-x)/(x+3) for answer. [(2)/(y-3)]+[£¨4£©/(3-y)] I got (-2)/(y-3) for answer. I'm not sure about the answers, please check them for me and correct me! THANKS A LOT!

### Calculus

Water is drained out of tank, shaped as an inverted right circular cone that has a radius of 6cm and a height of 12cm, at the rate of 3 cm3/min. At what rate is the depth of the water changing at the instant when the water in the tank is 9 cm deep? Give an exact answer showing...

### mrs SUe Algebra check

I cant figure this out 6 /2 * 8-8 /2 +4 i got 6/2 * 8-8 /2 3*8 4 24 -4 = 20 is this right way? 29 - (3+5) *2 +3 i got 16 is that right? 5-[6+3(-40/8) + (-2)exponent 2 i got 9 x5 = 45 + 4 = 5 -49 = -44 is that correct? [-6*(2-4)]/(-2)-(-9) i got -1.71

### Calculus

So, I have a homework question on The Quotient Rule (taking derivitives) and I would like to know if I did it right. Calculate: y=(1/sqrt(x))-(1/(5th root of x^3). My 1st step was to change the sqrt to x^1/2, and the 5th root to x^1/5+^3. So then I got y=(1/x^1/2)-(1/x^16/5). ...

### Algebra II

The directions are factor completely... the problem is 30xy-72y-3x^2y I got 3y(10x-24-x^2) but i don't think this is right does anybody know what the answer should be?

### Algebra 2

so i got a question and would like to know if i did this right For problems 1 through 38, transform the given expression to simple radical form. You can check your answer by evaluating it and the original expression by calculator. on the previous page this definition was given...

### Algebra

Hi, here is a question and my answer I have done so far, not sure about the end result so any help appreciated 5a-2 (5+4a)=-9 Multiply out brackets 5a-10+8a =-9 Add 10, 5a+8a=1 Collect like terms 13a = -9 Divide by 13 = a =1/13 I am pretty sure the answer should be a = -1/3 ...

### Calculus

find the area between x=tan^2y and x=-tan^2y in -pi/4<y<pi/4. I'm not sure how I can change the equations back to y=f(X) to graph. But it shouldn't really matter right? Do I do horizontal or vertical slicing? I feel like I should do horizontal since that's what the ...

### physics

What are the magnitude and direction of the particle’s acceleration? If a particle is moving along an x axis with a constant acceleration. Some points on the graph are (0, -2), (1,0), (2,6). I got 6 m/s to the right. is this correct? << got 6 m/s to the right. is this ...

### MAth

(2+6/3)*4 i need to solve this and i have but i am not sure if I am right or wrong. What I get is different than what a claasmate got as the answer. I say it is 16 but the other person gets a much higher #.

### Physics

I thought I did the problem right, but I don't think I came out with the right answer! Please someone check to see if I got this problem right. Calculate the force of gravity between Earth (mass=6.0*10^24 kg) and the moon (mass=7.4*10^22 kg). The average Earth-moon distance is...

### Math (pre-celc 12)

I'm not sure how to solve this equation algebraically: 38=20sin((2pi(t))/36)+22 I know the answer should be about 5.3 since I graphed it. I can get as far as removing 22 from the right and then removing 20 from the right by dividing by 20. To get 0.8=sin((2pi(t))/36)

### Physics

An athlete starts at point A and runs at a constant speed of 5.40 m/s around a round track 250 m in diameter. Find the x component of this runner's average velocity between points A and B. (answer is 3.44 m/s) Find the y component of this runner's average velocity between ...