Thursday
May 5, 2016

Posts by Mandy

Total # Posts: 550

Chemisrty
if electricity of sufficient voltage is passed into a solution of potassium iodide in water, a reaction takes place in which elemental hydrogen gas and elemental iodine are produced, leaving a solution of potassium hydroxide. what is the unbalanced equation?
March 20, 2016

Precal/Math
How do i get the left side to equal the right hand side? (Cosx)/(1+sinx) + (cosx)/1-sinx = 2secx
March 18, 2016

Math/Finance
Randy had $2000 he wants to double in 2 years. What is the approximate rate he will need??
February 18, 2016

Science
Ionic bonds: a. result from the sharing of electrons between atoms. b. form only between polar molecules. c. form between atoms that develop opposite charges. d. result from the natural repulsion that develops between protons. answer is C
January 30, 2016

Science
As a result of rigorous experimentation Question 7 options: more hypotheses may be developed. more questions may be asked. a new biological concept could emerge. entire theories may be modified or discarded. all of these i suppose
January 30, 2016

Algebra
The temperature at 7 AM in Chicago was 12 degrees. If the temperature increased 3 degrees every hour. What would the temperature be in Chicago at noon?
January 4, 2016

science
Thanks!
November 29, 2015

science
Circle all of the following that go through active transport. a)osmosis b)endocytosis c)diffusion d)exocytosis Please help me, I'll greatly appreciate it! :)
November 29, 2015

Graphing Reciprocal Trig Functions
a) y=csc(x-3) I understand that there are asymptotes at 0, pi, and 2pi and I know how to graph the base points but I am confused on how to move it with the phase shift. Do I use a table of value for the asymptotes and base points to move?
November 29, 2015

Solving Trig Equations
Solve for x in the interval [-pi,0] a) sin^2x = 3/4 I know that you have +root3/2 and -root3/2 and the positive one gives you an error when doing the inverse of sin, but im confused about the -root3/2. I found that one of the answers of x is -pi/3 (-60 degrees) which fits my ...
November 27, 2015

math
Thanks Damon! =)
November 24, 2015

math
Michael estimated his mass as 8 kilograms. Is his estimate reasonable? Justify your answer. Please help me thanks.
November 24, 2015

math
Can you make that more clear? I still don't get what you mean.
November 24, 2015

math
The label on a can of lemonade gives the volume as 12 fl oz, or 355 mL. Verify that these two measurements are nearly equivalent. Please help me with this question.
November 24, 2015

Advanced Functions
How would I do this: -cos(90-x) I know you would use the compound angle formula and I know how to do it but when you have -cos do you replace the cos with the negative? so for example -cos90(-cosx) + sinx(sin90)
November 14, 2015

English
Which word best matches the meaning of want best used in this sentence? (Many a time we were near suffocation, from the want of fresh air.)
November 4, 2015

Science
#3 is A and #5 is a
October 24, 2015

math
Five coupons of values $2,six coupons of values $3,two coupons of values $5 and two coupons of values $8 are put into a small box.Two coupons are drawn at random from the box without replacement.Calculate the probability that (b)the total value of two coupons is $10. [Answer:...
August 13, 2015

Biology
325
July 8, 2015

physical science
A man applies a force of 150N to pull a 20kg box with a rope that makes an angle of 60percent with the horizontal.The box experience a kinetic friction of 15N. Calculate the acceleration of the box.
June 6, 2015

english essay
Yup..all of it are shouldnt
April 4, 2015

english essay
Pls help me..give me a best sample of introduction (paragraph 1) and Conclusion(p.6) & keywords of the contents(p.2-5) about "Why people should quit gambling."
April 4, 2015

Physics
A 1500kg car is travelling around a large roundabout of radius 40m at a constant speed of 50kmh-1. Calculate the time it takes to go halfway aound the roundabout. Just wondering which equation I should use. Thanks
March 26, 2015

addmath A.P.
ASAP.. I knw the (a) a=5,d=5 But the (b) how to do?
March 8, 2015

addmath A.P.
An arithmetic progression has 8terms.The sum of all 8terms is 180 and the sum of all odd terms is 80. Calculate (a)the first term and common difference (b)the last term
March 8, 2015

addmath A.P.
Thanks Steve
March 7, 2015

addmath A.P.
Thanks Steve
March 7, 2015

addmath A.P.
Tn=3n-2 Find the first term,a;the common difference,d;and then find the 5th term.
March 7, 2015

Genetics biology
if what I read is correct then wouldn't the answer be yes he can sue since he is neither colorblind and even if the mother was color blind carrier it woudnt matter cause it has to be the father to pass it down also in his gene?
February 20, 2015

Genetics biology
A man and his wife both have normal vision, but a daughter who has color blindness can the man sue his wife for infidelity? show the cross help me please, have been lots of people saying no and yes to this
February 20, 2015

Math
6^7 x 6^11 divided 6^8 x 6^2
February 15, 2015

Math
3^12 divided 3x3^6
February 15, 2015

factorization
504
February 6, 2015

factorization
891 is wrong. Any multiple of 105 is the answer.
February 6, 2015

addmath A.P.
A wire of length 380 cm is cut into 10 pieces.Each piece is then bent to form a square.The dimensions of the first three smallest squares are shown below.Find the value of x and hence,the area of the eighth largest square. x cm[ ] (x+1)cm [ ] x cm (x+1)cm (x+2)cm[ ] (x+2)cm ...
January 18, 2015

addmath
Thank u
January 18, 2015

addmath
Find the total number of integers between 10 and 1000 that are divisible by 3.
January 18, 2015

addmath A.P.
Ohh..thank u ^^
January 14, 2015

addmath A.P.
Ohh..thank u ^^
January 14, 2015

addmath A.P.
The first three terms of an A.P. are p-5,p-3 and 2p-15.If the sum of the first n terms of the progression is 180,find the value of n. Answer:n=10
January 14, 2015

addmath A.P.
Yup..Thanks a lot!
January 12, 2015

addmath A.P.
The first three terms of an arithematic profgression are x,2x+y and 9x-y.The sum of these three terms is 60.Find the numerical values of x and y.Then,calculate the eleventh term of the progression
January 12, 2015

addmath
Thank you..
January 12, 2015

addmath
Given that k,3k and k+1 are three consecutive terms of an A.P,find the numerical value of k.Then find the first term if 3k is the sixth term of the progression. Answer:k=1over4 a=-7over4 I got the k but the a i can't get
January 12, 2015

Chemistry
The Ksp of calcium hydroxide, Ca(OH)2, is 4.68 x 10-6 at 289.15K. Calculate the pH of a saturated solution. Here's my work: 4.68 x 10-6= 4s^3 s= 0.0105 -log(0.0105)= 1.98 14-1.98=12.02 The answer is supposed to be 12.324, but I'm not sure what I'm doing wrong. Is ...
December 4, 2014

Genetics
A portion of alcohol dehydrogenase enzyme contains 375 amino acids. Including both amino acid and all other necessary codes, how long is the coding portion of the corresponding mRNA? Thanks
November 16, 2014

Help With Statistics
I would really appreciate help with this. In a survey of 1000 large corporations, 252 said that, given a choice between a job candidate who smokes and an equally qualified nonsmoker, the nonsmoker would get the job. Find a 0.95 confidence interval for p. (Round your answers to...
November 12, 2014

Math
A family purchased a new ski boat for $20,000. The loan agency required a down payment and financed the balance for 36 months with an APR of Determine the total finance charge and monthly payment for the loan.
November 9, 2014

Chemisty
In the titration of total acid with sodium hydroxide, NaOH, it was determined that 36.03mL of 0.0980M NaOH was needed to neutralize all the acid in a 10.0mL aliquot of a powdered drink mix solution. In a second titration, it was determined that were 1.45 x 10^(-5) moles of ...
October 22, 2014

Chemisty
Consider the reaction of sulfuric acid, H2SO4, with sodium hydroxide, NaOH. H2SO4(aq) + 2 NaOH(aq) -> 2H2O(l) + Na2SO4(aq). Suppose a beaker contains 35.0mL of 0.175M H2SO4. How many moles of NaOH are needed to react completely with sulfuric acid? Thank you
October 22, 2014

Chemistry
What volume of 5.0 M H2SO4 should be diluted to 100mL to prepare a 0.25 M H2SO4 M solution? I know the molar mass of H2SO4 is 98g but I'm not sure where exactly that fits in and how I'm supposed to get it to be diluted. Thank you!
October 8, 2014

math
2+2
August 1, 2014

Psychology
analyze the function of emotions as motive.
July 19, 2014

economics
Using an aggregate demand and supply diagram, explain how each of the following scenarios affects the equilibrium price level and aggregate output. Consider first the short-run, then the long-run equilibrium for each scenario. a) Consumers expect a recession, while resource ...
July 15, 2014

math
There are 25 red beads,x blue beads and y green beads in a box.When a bead is picked at random,the probability that it is blue is 1 over 4 and the probability that it is green is 1 over 3. (a)Find the value of x and y. (b)How many blue beads must be added so that the ...
July 7, 2014

Riddle
Haha wow..
July 7, 2014

math
In a bag,there are 18 cards of which x cards are coloured and the rest are white.When another 6 white cards are added into the bag,the probability of a white card being picked is x over 8.Find the value of x. Answer:6 How?
July 7, 2014

add maths
A point P moves so as to satisfy the ratio OP:PA=1:3,where O is the origin and A is the point (-4,0).Find the equation of the locus of P.
June 14, 2014

add maths
A point moves such that its distance from point A(1,0) is twice its distance from B(-2,0).Find the equation of the locus of the point.
June 14, 2014

chemistry pls help me asap
Thanks a lot^^
May 15, 2014

chemistry pls help me asap
2.08g of metal Y react with 0.96g of oxygen to form a metal oxide.The empirical formula of the metal oxide is Y2O3.What is the relative atomic mass of metal Y.
May 15, 2014

chemistry
Solution A:50cm^3 of 1.0mol dm^-3 hydrochloric acid,HCl Solution B:10cm^3 of 2.0mol dm^-3 hydrochloric acid,HCl (a)Calculate the number of moles of hydrochloric acid,HCL in each solution. (b)Solution A and B are mixed together. (i)Calculate the number of moles of hydrochloric ...
May 7, 2014

chemistry pls help me asap
100cm^3 of a sodium hydroxide,NaOH solution contains 4.0g of solid sodium hydroxide,NaOH.40 cm^3 of phosphoric acid,H3PO4 is needed to neutralise 40cm^3 of the alkali.(RAM:H,1;O,16;Na,23;P,31) (a)Calculate the molarity of the sodium hydroxide,NaOH solution. (b)Calculate the ...
May 7, 2014

chemistry
200cm^3 of 1.0 mol dm^-3 sulphuric acid,H2SO4 is poured into a 250 cm^3 volumetric flask.Distilled water is then added to make 250 cm^3 of solution. (a)What is the molarity of the diluted acid solution? (b)What is the volume of 1.6 mol dm^-3 sodium hydroxide,NaOH solution ...
May 7, 2014

chemistry
A student dissolved 3.65 g of hydrogen chloride gas,HCL in water to make 1.0dm^3 of solution.Calculate the volume of a 0.1 mol dm^-3 barium hydroxide,Ba(OH)2 solution required to completely neutralise 25.0 cm^3 of the acid solution.(RAM:H,1;CL,35.5)
May 7, 2014

chemistry
The volume of 0.15 mol dm ^-3 sulphuric acid,H2SO4 required to completely neutralise 25.0cm^3 of potassium hydroxide,KOH solution.
May 7, 2014

chemistry
50.0cm^3 of 2.0 mol dm^-3 aluminium sulphate,Al2(SO4)3 solution Calculate the number of moles of ions.
May 7, 2014

chemistry
Concentrated phosphoric acid,H3PO4 was added slowly into some water to produce 5.0dm^3 of a dilute acid solution.100g of the pure phosphoric acid,H3PO4 was present in the solution.Find the concentration of the acid,in g dm^-3.
May 5, 2014

chemistry
Calculate the volume of 2.0 mol dm^-3 sulphuric acid,H2SO4 needed to prepare 2.5 dm^3 of 0.5 mol dm^-3 of the same acid solution.
May 5, 2014

add maths
Find the equation of the perpendicular bisector of the straight line joining the points A(-1,0)and B(3,4).
May 5, 2014

add maths
Given that log2 3=h and log2 5=k, express log2 0.45 in terms of h and k.
May 3, 2014

add maths
Given that x=a^m and y=a^n.Express log^a(3 square root x over ay^2) in terms of m and n.
May 3, 2014

add maths
calculate the value of log square root p p^2.
May 3, 2014

add maths
Find the value of logb square root b - loga(1/a)
May 3, 2014

math
Oh thanks..its 2^5=32..
April 2, 2014

math
Given a set with n elements has 2^n subsets.Find the number of subsets for set A={2,3,5,7,11}.
April 2, 2014

add maths
10^2n+3 × 20^n × 5^n Step:? Answer:10^4n+3
April 2, 2014

Algebra
If a salesman earned 6% commissions on sales, and in one week he earned $300 in commissions, how much merchandise did he sell that week?
March 19, 2014

Business Math
True Value received an invoice dated 4/28/12. The invoice had a $5,700 balance that included $600 freight. Terms were 5/10, 4/30, n/60. True Value pays the invoice on May 12. What amount does True Value pay?
February 27, 2014

Business Math
A local Barnes and Noble paid a $79.33 net price for each calculus textbook. The publisher offered a 10% trade discount. What was the publisher’s list price? (Round your answer to the nearest cent.)
February 27, 2014

Answers
change the 2)B and 5)A and its 100%
February 25, 2014

add maths
f(x)=3x^2-12x+20 Find minimum value and value of x
February 23, 2014

logarithms
3^x=6
February 19, 2014

Business Math
Rainfall for May in Fiji averages 9" according to World Travel Guide. This year it rained 5% less. How many inches did it rain this year?
February 19, 2014

math 3
45 feet
February 12, 2014

Physics
Where do you get the 14.4*10^16 from?
February 5, 2014

Physics
If the period of the moon were 31 days while its orbit radius 3.8x10^8m, what would the mass of the Earth be?
February 5, 2014

add maths
Given that the quadratic equation is (2m+3)x^2+(4m-2)x-(m+1)=0.Find the value of m,if •one of the root of the equation is negative •one of the root of the equation is reciprocal of the other
February 2, 2014

maths
The sum of a number and four times its reciprocal is 5.Find possible values of the number.
January 28, 2014

add maths
2+square root 3 & 2- square root 3 Form equation ..
January 27, 2014

add maths
2+square root 3 & 2- square root 3 Form equation ..
January 27, 2014

maths
Thank you^^
January 26, 2014

maths
A woman is now 4 times older than her daughter.Six years ago,the product of their ages was 136.Find their present ages.
January 26, 2014

add maths
x^2-17x+52=0 The answer is 4,13 But i dont know how to do..
January 26, 2014

add maths
x^2-17x+52=0 The answer is 4,13 But i dont know how to do.. ASAP...
January 26, 2014

maths
The question answer is x=8,10....how to get it..pls help me..
January 25, 2014

maths
The product of two consecutive even numbers os 80.Find the values of the numbers.
January 25, 2014

maths
The area of the right angled triangle abc (x+4)(x+3) is twice the area of a square with sides x cm.Write a quadratic equation in terms of x.
January 23, 2014

maths
Ravi bought x toys for 27$ and 3 mechanical pencils for x$.Given that the total cost of a toy and a mechanical pencil is 6$,write a quadratic equation in terms of x.
January 23, 2014

add maths
Function f and g are defined by f:x→4-x and g:x→px^2+q where p and q are constants.Given that the composite function gf:x→x^2-8x+11,find the values of p and q.
January 22, 2014

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