# Posts by jk

Total # Posts: 101

science
21

Maths
Find x such that the point (x,4) is 10 units from (-2,-2)

english
I consider that cosmetic surgery is a personal option but in some cases it becomes a bad addiction because expand this please

Algebra
For the function f(x) = 5/x+4 find the average rate of change of f from 1 to x:

chemistry
what products would form after hydrogenation of 2-methyl-1-butene? after halogenation (cl2)?

AP chemistry
what products would form after hydrogenation of 2-methyl-1-butene? after halogenation (cl2)?

chemistry
what products would form after hydrogenation of 2-methyl-1-butene? after halogenation (cl2)?

precalculus
use the discriminant to determine whether the equation is a parabola, an ellipse, or a hyperbola. Then identify the angle of rotation required to eliminate the xy-term. x^2+4xy+y^2=1 5x^2-6xy+5y^2-8x+8y-8=0 9x^2+24xy+16y^2=25

precalculus
find the eccentricity to identify the conic, then sketch the conic and its directrix r=1/1-cos theta r=2/3+2 sin theta r=4/1-2 cos theta

precalculus
find the eccentricity to identify the conic, then sketch the conic and its directrix r=1/1-cos theta r=2/3+2 sin theta r=4/1-2 cos theta

precalculus
find directrix of 1/1-cos theta

precalculus
so its y^2-2y=x not solving for y?

precalculus
how do you eliminate the parameters for x=1-t^2 and y=1+t?

pre-calculus
find directrix of 2/3=2 sin theta

pre-calculus
how do you eliminate the parameters for x=1-t^2 and y=1+t?

pre-calculus
i didn't get a circle by using 0, pi/6, pi/4, pi/3, and pi/2?

pre-calculus
how to graph equation?

pre-calculus
what is the graph for this equation?

pre-calculus
why squared?

pre-calculus
eliminate parameters of x=1+cos t y=1-sin t graph the parametric equations

precalculus
find an hyperbola equation with foci (0, +/-8) and asymptotes; y=+/-1/2x?

precalculus
find a hyperbola equation with vertices (o,+-4) and passes through the point (3,-5)

math
1.4 because u have to divide 5 divide 7.

chemistry help
a 3.54 grams solid sample of an unknown monoprotic acid was dissolved in distilled water to produce a 47.0 mL solution at 25 degrees. This solution was then titrated with 0.2 M NaOH. The equivalence point was reached when 35.72 mL of 0.2 M NaOH was delivered. A. find the ...

chemistry help
In the following questions, assume that no excess distilled water was added from a wash bottle during the titration of 10.00 mL of vinegar with your standardized solution of NaOH. A. calculate the pH of vinegar. B. what was the pH of the solution after 4.00 mL of titrant was ...

chemistry help
A 15.00 mL sample of an unknown monoprotic weak acid solution is titrated with 0.35 M NaOH. The initial buret reading is 0.23 mL. The phenolphthalein indicator turns the solution light pink when the buret reads 29.58 mL. B. How many moles of NaOH were delivered? C. How many ...

chemistry
you cant solve it?

chemistry
In the following questions, assume that no excess distilled water was added from a wash bottle during the titration of 10.00 mL of vinegar with your standardized solution of NaOH. A. calculate the pH of vinegar. B. what was the pH of the solution after 4.00 mL of titrant was ...

chemistry
A 15.00 mL sample of an unknown monoprotic weak acid solution is titrated with 0.35 M NaOH. The initial buret reading is 0.23 mL. The phenolphthalein indicator turns the solution light pink when the buret reads 29.58 mL. A. what volume of 0.35 M NaOH was delivered? B. How many...

chemistry

chemistry
a 3.54 grams solid sample of an unknown monoprotic acid was dissolved in distilled water to produce a 47.0 mL solution at 25 degrees. This solution was then titrated with 0.2 M NaOH. The equivalence point was reached when 35.72 mL of 0.2 M NaOH was delivered. A. find the ...

easy math
√(100 - 20√5 + 5 + 15 - 6√15 + 9) solve.

precalculus help
Let z1=2(cos 2pi/3+isin 2pi/3) what are z1^(1/3)? do not even know how to apply demoivre theorem?

precalculus
algebraically identify the symmetries of r=2sin(2theta)

Philosophy
evolbiol.ru/blankslate/blankslate.htm‎

precalculus
Let u have a length of 20 and direction of 60 degrees, and v= 5i-3j what is u? what is abs(2v-u)?

precalculus
Let z1=2(cos 2pi/3+isin 2pi/3) what are z1^(1/3)?

precalculus
Let u= <3,1> and v=<6,-1> A. what is the angle between u and v? B. find projvU C. reoslve u into u1 parallel to v abd U2 perpendicular to v.

us history
free soil party

precalculus
B. find projected vU C. resolve u into u1 parallel to v and U2 perpendicular to v.

precalculus
Let u= <3,1> and v=<6,-1> A. what is the angle between u and v? B. find projvU C. reoslve u into u1 parallel to v abd U2 perpendicular to v.

precalculus
what are those numbers in radians

precalculus
no not at all

precalculus
Let z1=2(cos 2pi/3+isin 2pi/3) what are z1^(1/3)?

precalculus
solve the rest because i am not getting correct answer?

precalculus
Let u have a length of 20 and direction of 60 degrees, and v= 5i-3j what is u? what is abs(2v-u)?

chemistry
calculate the pH after 0.02 mol NaOH is added to 1.00 L of .1 M sodium propanoate NaC3H5O2

chemistry
PH of gatorade and body sweat

find the moles of each element then divided by total volume

SUPER HARD CHEMISTRY
a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point

HARD COLLEGE CHEMISTRY
thanks

HARD COLLEGE CHEMISTRY
a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point and 5 mL past the equivalence point. how much is 5 mL past? i do not know how to do it?

COLLEGE CHEMISTRY HARD
a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point and 5 mL past the equivalence point. how much is 5 mL past? i do not know how to do it?

COLLEGE CHEMISTRY HARD
jai i still need help

COLLEGE CHEMISTRY HARD
calculate the ph at the equivalence point for the titration of 0.01 M Ch3COOH with 0.1 M NaoH ka= Ch3Cooh 1.8E-5 idek how to do it?

college chemistry HARD
thanks

college chemistry HARD
I STILL NEED HELP WITH EQUIVALENCE POINT WITH THIS PROBLEM

college chemistry HARD
a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point and 5 mL past the equivalence point. how much is 5 mL past? i do not know how to do it?

chemistry
calculate the ph at the equivalence point for the titration of .1 M NH3 and .1 M HCl. kb NH3= 1.8E-5 how you do it?

chemistry
calculate the ph at the equivalence point for the titration of 0.01 M Ch3COOH with 0.1 M NaoH ka= Ch3Cooh 1.8E-5 idek how to do it?

chemistry
a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point and 5 mL past the equivalence point. how much is 5 mL past? i do not know how to do it?

math - exponent laws
now you mention,yes I could have paste the link but i didn't think of it, SORRY! Thank You very much!

math - exponent laws
evaluate -(11/17^-10/(9/5)^(1/10) answer from Reiny: (-11/-17)^-10 = 1/(11/17)^10 = 77.725... (I stored that in A on my calculator) (9/5)^(1/10) = 1.0605.. so -(11/17^-10/(9/5)^(1/10) = -77.725... /1.0605... = -73.28837824 --- do we need to reciprocal -(11/17) to -(17/11) ?

MATH - exponent laws
do we need to reciprocal -(11/17) to -(17/11) ?

MATH - exponent laws
how do you evaluated this? (-)sign ↓ _ __________( -11/-17)^-10 line is divide (9/5)^1/10

Calculus
oi

math
Sam bought a new car for \$26,500. The car depreciates approximately 13% of its value each year. A) What is the decay factor for the value of this car? b)  Write an equation to model the decay value of this car? c)  What will the value of the car be in 10 years?

Math
angles ABC and XYZ are complementary angles. if m < ABC is 18 more than three times m < XYZ, find < XYZ i have no idea how to do this i know that something has to equal 18+ 3m but i don't understand the (<) sings

Math
4*3 8*9

Science
Thanks Kiki!!!!

chemistry
Where is an electron in 3Py orbital most likely to be found and where does the probability it vanish?

Physics (mechanics)
A u-control airplane of mass m is attached by control wires of length L and negligible mass to the "pilot" who controls the lift provided by the wing FL. The wires control the plane's elevator or angle of attack. The plane's engine keeps it moving at constant...

Alan
could anyone test ACDE??

physics
exercise 4.1 suppose the pilot start agin from rest

parallelograms
52.2

geometry
there are 4 cirlces in an equilateral triangle with sides equal to 16cm. what is the radius of the big circle and the little circles

physics
jk

chemistry
for empirical formula C=3.97mg; H=0.44mg; and O=5mg-3.97mg-0.44mg=0.59mgO Then 0.59mg/16g=0.036mmol. Then you good to go! Thank you DrBob222:D

chemistry
I got the right answer by following DrBob222's step

math
50

Math
998

Finance
102,857

Understanding percent
In the square, if part A is 1/4 of the square and part C is 1/10 of the square, what percent of the square is part B?

Poop
Yo JK just kid in yo!!!!! Got any poopy patties

English
Vinegar (by Roger McGough) sometimes i feel like a priest in a fish and chips queue quietly thinking as the vinegar runs through how nice it would be to buy supper for two (1967) Poem for Roger McGough (by Adrian Henri) A nun in a supermarket standing in the queue Wondering ...

english
Vinegar (by Roger McGough) Poem for Roger McGough (by Adrian Henri) sometimes A nun in a supermarket i feel like a priest standing in the queue in a fish and chips queue Wondering what it’s like quietly thinking To buy groceries for two. as the vinegar runs through (1967...

Physics 203
7890

Chemistry
How many moles of oxygen atoms are contained in 1.86 x 10-2 mol CuSO4·5H2O

Algebra 1
Nico drives from school to the store at 25 miles per hour. He drives back to the school (along the same route) at 35 miles per hour, and the returns to the store (via the same route) travelling at 40 miles per hour. Find the average rate for the three trips. Round your answer ...

Organic Chemistry
Benzyl chloride, through a primary halide, readily a precipitate when treated with 2% ethanolic silver nitrate. Why?

math
A ferris wheel is 35 meters in diameter,and can be boarded at ground level. The wheel turns in a counterclokcwise direction, completing one full revolution every 5 minutes. Suppose that a t=0 you are in the three o'clock position. Write a formula, using the sine function ...

math
sinx+ siny/ (cosx+cosy)= tan 1/2 (x+y) prove this identity

Physics Help
velocity

math
5

enlgish
Last night, lucy and Neil met Morey in Gramercy Park. 1. The object of the verb is.? 2. the predicate of the sentence is?

French
Is "je suis allé souvent" correct or should it be "je suis souvent allé?" Thanks

psy
OMG that is exaclty how I was feeling when reading the text. I know Im not stupid but when I read the explanations I do feel a little slow because I know its not that hard to figure out. So why do they make it something so easy seem difficult

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