Tuesday

January 17, 2017
Total # Posts: 104,589

**pre calculus**

How do you use de Moivre's formulas to find ?i?

*November 27, 2016*

**precalculus**

How do you convert <12,13> to polar form?

*November 27, 2016*

**precalcalculus**

use the information to solve the triangle. If two solutions exist, find both solutions. How do you work this out? 1.A=36°, B=98°, c=16 2.a=4,b=8,c=10 3.A=35°,b=8,c=12 4.A=25°,b=28,a=18 5.B=130°,c=10.1,b=5.2 6.A=150°,b=4.8,a=9.4

*November 27, 2016*

**precalculus**

how do you convert to polar form?

*November 27, 2016*

**Physics**

A brick of mass 2kg just begins to slide down an inclined plane at an angle of 45 degree with horizontal.what will be the force of friction

*November 27, 2016*

**Math**

find the velocity and direction of flight of a plane that is headed at 126 degrees with a ground speed of 215 mph in a 34 mi wind from south 36 degrees west

*November 27, 2016*

**science**

What is the average speed of a race cow that travels 60 meters in 20 seconds?

*November 26, 2016*

**Instructional Materials**

exam 026039RR

*November 26, 2016*

**Math**

A cooperation must appoint a president, CEO, COO,and a CFO. It must also appoint a planning committee with 3 different members. There are 15 candidates and officers can also serve on the planning committee. How many different ways can the officers be appointed? How many ways ...

*November 26, 2016*

**Math grade7**

Anybody answer those

*November 26, 2016*

**pre calculus**

find (a)2v+u, (b)u-3v), and (c)5u-v. 1.u=i-j, v=6i+9j 2.u=2i+3j, v=-i-2j

*November 26, 2016*

**pre calculus**

find (a)2v+u, (b)u-3v), and (c)5u-v u=<-2,-3> v=<-1,-10>

*November 26, 2016*

**pre calculus**

Forces with magnitudes of 250 pounds and 130pounds act on an object at angles 45degrees and -60degrees respectively with the positive axis. Find the direction and magnitude of the resultant of these forces.

*November 26, 2016*

**pre calculus**

Find the component form and magnitude of the vector w that has initial point(-8,-12) and terminal point (4,1)

*November 26, 2016*

**pre calculus**

A triangular parcel of land has borders of lengths 55 meters, 85 meters, and 100 meters. Find the area of the parcel of land.

*November 26, 2016*

**pre calculus**

find (a)2v+u, (b)u-3v, and (c)5u-v u=<0,-4>, v=<-2,-8>

*November 26, 2016*

**pre calculus**

Write the complex number 100(cos240°+ i sin240°) in standard form.

*November 26, 2016*

**pre calculus**

Write the complex number z=-2+2i in trigonometric form.

*November 26, 2016*

**math**

you want to buy three books that are on sale at 20% off. the original prices of the books are $2.50, $4.95, and $6.00. How much will you save?

*November 26, 2016*

**pre calculus**

ea + bi = ea(cos b + i sin b) This formula gives rise to the equation e?i + 1 = 0. . Show how Euler’s formula can be used to derive this equation.

*November 26, 2016*

**pre calculus**

how do you use e^a+bi = e^(cos b + i sin b) to derive the equation e?i + 1 = 0

*November 26, 2016*

**math**

If f is a function such that the limit as x approaches a of the quotient of the quantity f of x minus f of a and the quantity x minus a equals 7, then which of the following statements must be true?

*November 26, 2016*

**math**

If f(?1) = ?3 and f prime of x equals the quotient of 4 times x squared and the quantity x cubed plus 3 , which of the following is the best approximation for f(–1.1) using local linearization

*November 26, 2016*

**math**

Which of the following is the best linear approximation for f(x) = sin(x) near x = ? seconds?

*November 26, 2016*

**Physics**

If the angle of incidence is 30degree and refractive index is 2 find the angle of refraction.find whether the medium is denser or rarer

*November 26, 2016*

**.**

This is what I got I was just unsure if it was right, thank you.

*November 26, 2016*

**Maths help asap please**

What is the smallest integer of c that satisfies the inequality of 3c-7 > 5c+4 Many thanks.

*November 26, 2016*

**math**

Thr sum of three numbers is 33.The first no.is twice the third no.The second no.is one more than the first.Determine the nos.

*November 26, 2016*

**Math**

The sum of two nos is 40, the smaller no is 6 less than the larger no, Find the nos

*November 26, 2016*

**Physics**

I omega = constant before I suppose we could model the device as a flat disk I = .5 M r^2 = .5(118)(1.8)^2 I omega = I (.47*2 pi) now after Inew = I + 20(1.8)^2 so I omega = Inew Omeganew .5(118)(1.8)^2(.47*2 pi)=Inew* Omeganew that will give omega new in radians/sec divide by...

*November 25, 2016*

**Physics**

A playground merry–go–round has a mass of 118 kg and a radius of 1.80 m and it is rotating with an angular velocity of 0.470 rev/s. What is its angular velocity after a 20.0–kg child gets onto it by grabbing its outer edge? The child is initially at rest.

*November 25, 2016*

**chemistry**

if i have an isopropyl group and the a carbon with a methyl group on it, will the methyl protons be split by the isopropyl protons? (CH3)2---C-C-(CH3)

*November 25, 2016*

**Physics**

(1/2) m v^2 = m g h

*November 25, 2016*

**Physics**

Jacob is a little too excited about finishing his homework and throws his hands up in the to shout, "I'm done!" He accidentally drops his 2.3 kg pencil straight down from a height of 2.12 m. what will be the kinetic energy of the pencil just before it hits the ...

*November 25, 2016*

**Physics**

Jacob is working on his physics portfolio and stands on a 0.45m high step. If Jacob’s mass is 103kg, what is his potential energy while on top of the step? Givens: Unknown: Equation: Substitute: Solve:

*November 25, 2016*

**biochemistry**

how many grams each of tris and tris HCl are needed to make up 500ml of 1m tris buffer with a PH of 8.0. pka of tris =8.3 mwt of tris =121 mwt of tris HCl =175

*November 25, 2016*

**chemistry NMR helpppp**

really really need some help, been stuck on this for toooo long. Some Data: "A" triplet for 3H (2 neighbors) "B" quartet for 2H (3 neighbors) "C" singlet for 3H (no neighbors) "D" singlet for 2H (no neighbors) Alright here is what i have...

*November 25, 2016*

**Math**

The difference between a number and the number that formed by reversing the digits is 36.if the digit at the tens place is twice the digit at the unit's place.find the number

*November 25, 2016*

**accounting**

A debit increases the balance in all of the following accounts except for which one?

*November 24, 2016*

**math**

A bus contain 42 passengers the number of male is 5 times the number of female how many famale in the bus

*November 24, 2016*

**Math**

How do you multiply 12 times 13 step by step step

*November 24, 2016*

**English**

recent

*November 24, 2016*

**Chemisty**

I guess that 22.909 L

*November 23, 2016*

**wirting**

how to use APA citing on the following phase "The movie Silver Linings Playbook"

*November 23, 2016*

**simplex method**

Maximize P=60x+50y. ? ?x+y?80 ? ?5x+10y?560 ? ?50x+20y?1600 ? ?x?0 ? ?y?0 ? ? ? ? ? ? ? Use the simplex method to solve the problem. Use s, t, and u as your slack variables for the first, second, and third inequalities respectively. Use the final simplex tableau to identify ...

*November 23, 2016*

**Calculus**

An object at the origin at time t= 0 has velocity measured in meters per second, v(t) = t/30 if 0 <= t <= 90 = 3 if 90 < t <= 108 = 9-(t/30) if 180 < t When, if ever, does the object return to the origin? t=

*November 23, 2016*

**Further mathematics**

Given that x squared + y squared = 5xy,show that; (a) 2log(x+y\?7)=log x + log y. (b). Log ( x- y\?3) = 1\2( log x + log y)

*November 23, 2016*

**pre calculus**

can you please explain what steps you take to find ||u||2 when u: <-1,7> v: <6,4>?

*November 23, 2016*

**pre calculus**

Can you explain how to find (u • v)(u + v) when u <-1, 7> and v <4, -3>

*November 23, 2016*

**Calculus**

Find all values of c that satisfy the Mean Value Theorem for integrals for f(x)= x^{2} on the interval [-3, 3]

*November 23, 2016*

**The Graphical Method**

Appericate it !

*November 23, 2016*

**Calculus**

If f(x) = integrate t^2 from x to x^2, then f'(x)= f'(-1)= Please help! I have no idea how to approach this.

*November 23, 2016*

**mathematics**

novel. x=5.

*November 23, 2016*

**mathematics**

a survey of reading habits of 100 students showed that 30 read both comics and novels. 10 read neither comics nor novels and twice as many students read comics as read novels. 1. illustrate the information on a Venn diagram. 2. how many students read only novels. 3. how many ...

*November 23, 2016*

**calculus**

how do you work out what ||u||2 is when you are given u:<-1,7> and v:<6,4>

*November 23, 2016*

**pre calculus**

Given: u <-1, 7> and v <4, -3> Find: (u • v)(u + v) ________________________________________ <25, 100> <-25, 100> <-75, -100> <75, -100>

*November 23, 2016*

**pre calculus**

Use the following vectors to answer the question. u: <-1,7> v: <6,4> What is the projection of u onto v?

*November 23, 2016*

**pre calculus**

Use the following vectors to answer the question. u: <-1,7> v: <6,4> What is ||v||2?

*November 23, 2016*

**pre calculus**

Use the following vectors to answer the question. u: <-1,7> v: <6,4> What is ||u||2?

*November 23, 2016*

**algebra~help me**

18^(4-4y)=54(sqrt(2))^(3y-2) step plz help me

*November 23, 2016*

**physics**

Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.

*November 23, 2016*

**physics**

Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.

*November 23, 2016*

**Economics(pls Help)**

Zoe Goggles is a deep sea underwater photographer. Her camera and lenses are valued at $4,000. There is a chance of 1/20 that she will lose her equipment on a dive over the course of the year. Her wealth, including the value of her equipment, is $30,000. Zoe’s utility ...

*November 23, 2016*

**math**

the sum of two no is 50 .the smaller no is two third of the greater no.. find the no.

*November 22, 2016*

**Physics**

A 103kg SWAT team member descends a 27.5m cable attached to a helicopter. If he wishes to reach the bottom in 3.5s, what average force should he apply to the cable?

*November 22, 2016*

**math**

Bob needs to mix 2 cups of orange juice concentrate with 3.5 cups of water to make orange juice. Bob has 6 cups of concentrate. How much orange juice can he make?

*November 22, 2016*

**Algerbra**

Write an equation in slope-intercept form of the line that passes through the given point and is parallel to the graph of the given equation. (-8, -4); y=-4x+3 Write an equation for the line in slope-intercept form.

*November 22, 2016*

**Math**

A movie theater sold 3 adult tickets for every 5 children tickets. They sold 180 more children tickets than adult tickets. How many children tickets were sold and how many adult tickets were sold?

*November 22, 2016*

**Math**

How many different integers represent the sum of two or more members of the set {-4,-3,-2,-1,0,1,2,3,4}?

*November 22, 2016*

**Math**

Deposit $5 weekly in 40 yrs what is the balance

*November 22, 2016*

**PHYSICS URGENT!!!**

maybe you should listen in our sef005 lectures

*November 22, 2016*

**maths need help**

If Log (a+3) (base 9) - log b(base 9)= c + (1/2) and log (a-3) (base 3) + log b (base 3)=c - 1. show that a^2=9 + 27^c and find the possible values of a and b when c=1

*November 22, 2016*

**Math**

Q. a^4 - 13a + 36 Factorise

*November 22, 2016*

**PHYSICS PLEASE HELP ME**

ay that makes no sense cuz. Fix up look sharp bruv.

*November 22, 2016*

**math**

If a circle is circumscribing triangle xyz,find the radius of the triangle. Calculate the area inside the circle but outside the triangle

*November 22, 2016*

**Chemistry**

Is "a color of solution becoming less intense due to dilution" maybe evidence of chemical reaction or not?

*November 21, 2016*

**Physics**

Is it true that with buoyancy, the weight of the displaced water equals the weight of the complete object, even if only a part of the object is submerged? If so, why, since the weight of a larger object would be greater than that of a smaller one?

*November 21, 2016*

**algebra**

The revenue function for a bicycle shop is given by R(x) = x Â· p(x) R x x p x dollars where x x is the number of units sold and p(x) = 100 âˆ’ 0.4x p x 100 0 4 x is the unit price. Find the maximum revenue.

*November 21, 2016*

**dav chd**

Depress the quartic x^4 - 4x^3 + 2x^2 + 4x + 4 into w^4 - 4w^2 + 7

*November 21, 2016*

**american goverment check answers**

random is correct, I just took the quiz its: 1.)C 2.)C 3.)A 4.)A 5.)C 6.)C 7.)A 8.)C 9.)D 10.B

*November 21, 2016*

**american goverment check answers**

9.a

*November 21, 2016*

**american goverment check answers**

9. What criteria might a judge who abides by a philosophy of judicial restraint use to decide a case? (1 point) The judge would consider previous court decisions on the topic but ultimately consider the current circumstances and changes in society. The judge would not consider...

*November 21, 2016*

**social studies**

On November 12, 1815 Elizabeth Cady Stanton spokesperson for the rights of women was born in Johnston, New York. Stanton formulated the philosophical basis of the woman suffrage movement, blazing a trail many feared to follow. Stanton verbal brilliance combined with the ...

*November 21, 2016*

**science**

A librarian lifts a box of books that weighs 93N a distance of 1.5 m. How much work does he do?

*November 21, 2016*

**Science**

what question

*November 21, 2016*

**Science**

knowlege

*November 21, 2016*

**social studies**

D A A B

*November 21, 2016*

**social studies**

D A A B

*November 21, 2016*

**social studies**

On November 12, 1815 Elizabeth Cady Stanton spokesperson for the rights of women was born in Johnston, New York. Stanton formulated the philosophical basis of the woman suffrage movement, blazing a trail many feared to follow. Stanton verbal brilliance combined with the ...

*November 21, 2016*

**social studies**

1. According to the passage, what can be inferred about how Elizabeth Cady Stanton’s personal qualities affected the women’s suffrage movement? Her enthusiasm gave the movement a set of core beliefs. Her philosophical views provided the movement with a clear focus. ...

*November 21, 2016*

**algebra**

It took Joe 1 1/2 hours to walk to the mall. James did it in 1/5 of the time it took Joe. How long did James take?

*November 21, 2016*

**general**

Hmmm. What you mean is that you want her to digest the articles and explain what they mean, rather than reading them yourself and giving it some thought.

*November 21, 2016*

**Math**

56 decreased by twice Craig's savings

*November 21, 2016*

**Social studies**

It doesnt say the answer in their

*November 21, 2016*

**Social studies**

Can u help me

*November 21, 2016*

**Social studies**

Hi ms sue what is the answer to the question A; they allow producers better access to world markets ? B; they make it possible to employ more skilled labores ? C ; they provide tools that make production more efficient ? D ; they purchase raw materials needed for production

*November 21, 2016*

**Social studies**

How are capital resources used in production

*November 21, 2016*

**Maths help asap please.**

Thank you so much.

*November 21, 2016*