# Posts by Tom

Total # Posts: 1,460

**Statistics**

There are two decks of cards. Each deck has a red, a yellow, a blue, and a green card in it. If a card is drawn, from the first deck, and then a second card drawn from the second deck, what is the probability that a red card and green card are drawn (not necessarily in that ...

**calculus**

ohh i see it cot x = radical 3 / 3 so the tan x = 3 / radical 3 — which is radical 3 when rationalized so x= pi/3? and 4pi/3?

**calculus**

wait i’m lost so you get radial 3 / 3 Then what ?

**calculus**

in the second step , don’t you divide by 3 on both sides ?

**calculus **

3cotx - radical 3 = 0 solve for x please show it step by step

**Math please help!!!**

Thank you

**Math please help!!!**

Solve the system of equations to find x,y,z (hint let d=x2 e=y2 and d=z2 . Find d e and f first) 2 means squared I don't have it on my keyboard. X2+y2+z2=9 3x2-y2-z2=7 Y2+2z2 =6

**Pre-calc**

16/(2x+2)

**Pre-calc**

Perform the operation and write the result in standard form. ___16___ 2x+2

**Pre-calc**

Find a polynomial function with -2 and 3-i.

**Economics**

The pricing of pharmaceutical products can be controversial. A recent example is EpiPen produced by Mylan which is used to treat anaphylaxis. The retail price of an EpiPen is $300, while industry sources estimate that it costs around $30 to produce each unit (i.e. one dose). ...

**calc**

so is it x+y

**calc**

given that log2 3 = x, log 2 5=y and log 2 7 = z, express log 2 21 in terms of x,y, and z the 2 is the base

**calc**

tan3x= radical3 / 3

**calc**

so what about tan3x= radical3 / 3

**calc**

sin2x = (radical 3)/ 2 solve each equation on the interval [0,2pi)

**Computational Thinking**

The Happy Cow Ice Cream Company manufactures several types of ice cream. Design a flowchart or pseudocode for a program that accepts an ice cream flavor (for example, “triple chocolate”), price per gallon, and number of gallons sold in the average year. Display a ...

**Computational Thinking**

Anybody Help on this:The Daily Gazette accepts classified ads in several categories. For most ads, the newspaper charges 10 cents per word for the first 50 words, and 8 cents per word for every word after that. Design a flowchart or pseudocode for a program that accepts data ...

**calc**

csc -5pi/6 = is it -2?

**computer code**

Design a pseudocode for a program that accepts an ice cream flavor the price per gallon and number of gallons sold a year, display a message this flavor is the best seller having more than 40000 gallons a year sold

**CHEM**

lol you're dumb. it clearly asked for an answer for grams and the answer key says it's 100g

**CHEM**

dude i converted from grams to moles to moles back to grams

**CHEM**

so the answer is 100g?

**CHEM**

I know that. The question asks how many GRAMS of Na3PO4 can be made

**CHEM**

If 100g of NaOH are reacted with 85.00g H3PO4, how many grams of Na3PO4 can be made? Make sure the final answer is in the correct number of sig figs. 3NaOH + 1H3PO4 ---> 1Na3PO4 + 3H2O I got 100g Na3PO4

**precalc**

does x=-7?

**precalc **

(-2)^x = - 1/128 solve for x

**calculus **

if cos of theta= -4/5 and tan of theta > 0, find sin of theta

**math**

what is 3 5/6 minus 3/4

**college chem**

a student dissolves 1.0mole of sucrose in 1000 grams of water at 1.0atm. Compared to the boiling point of pure water , the boiling point of the solution is?

**college chem **

a 16 gram sample of oxygen has a volume of 11.2L at standard pressure . what is the temp of the oxygen ?

**Math - trigonmetric functions **

Determine whether -105° and -465° are co-terminal angles and can you show me the steps of how you did it

**Stats**

it says 0.053 is wrong

**Stats**

In the game Roulette, a ball spins on a circular wheel that is divided into 38 arcs of equal lenght, numbered 00, 0, 1, 2, ... , 35, 36. The number on the arc on which the ball stops is the outcome of one play of the game. The numbers are also colored as follows: 1, 3, 5, 7, 9...

**maths**

one number multiplied by three less than itself equals 18. If that number is positive, what is it? Please show working.

**Algebra**

Write an absolute value inequality to fit the graph below: There is a Number line with 14 on the left and 26 on the right with solid dots on both.

**Physics (Mirror Rays)**

Lol, thanks.

**Physics (Mirror Rays)**

3. When an object is located very far away from a convex mirror, the image of the object is 18 cm behind the mirror. Using a ray diagram drawn to scale, determine where the image is located when the object is placed 9.0 cm in front of the mirror. Note that the mirror must be ...

**Physics**

A 3-kg mass has a speed of 5.0m/s at the bottom of a 37 degree incline. How far up the incline does the mass slide before it stops if the friction force acting upon its motion is 20N? Thanks.

**Math**

In a middle school computer club, 3/8 of the members are girls. Of the girls in the club, 2/5 are 6 graders. Write and solve an equation to find the fraction of the members of the club that are 6 grade girls

**chem**

i got 12.5g am i right?

**chem**

if 4.1g of Cr is heateed with 9.3g of cl, what mass of crcl3 will be produce

**math**

given cot theta = 11/12, find tan of theta and sin of theta

**Statistics**

The correlation coefficient between X and Y is the same as the correlation coefficient between Y and X: True or False - I believe it is True because calculating the correlation coefficient for X and Y and Y and X will give you the same answer.

**Chemistry **

Identify the acid-base pairs in the following reactions HSO4^1-(aq) + OH^1- <==>SO4^2-(aq) + H2)(I)

**English **

A similie , metaphor (etc) for relief??

**math**

if logb C= A, explain why logb 1/c = -a

**chemistry**

60.0 g of iron that has an initial temperature of 250 degrees C and 60.0 g of gold that has an initial temperature of 45.0 degrees C are brought into contact with one another. Assuming no heat is lost to the surroundings, what will be the temperature when two metals reach ...

**chemistry**

Suppose a balloon is filled so that its volume is 2.00 L when the pressure is 1.10 atm and the temperature is 300k. What volume will it occupy if it rises to an elevation where the pressure is 418mm Hg and the temperature is 200k?

**Chemistry**

A gas occupies 56.44 L at 2.00 atm and 310 K. If the gas is compressed to 23,520 mL and the temperature is lowered to 281 K, what is the new pressure in torr?

**economics**

the elasticity

**economics**

Explain why we can’t predict tax revenues by using the amount of the tax and the previous time period’s consumption.

**economics**

cost effectiveness means you are not reaching the efficiency

**algebra 2**

what is the inverse of the function f(x) = 6+x ----- 2x

**computer programming**

Create the psuedocode for an application class named Monogram. Its main() method holds three variables that hold your first, middle, and last initials, respectively. Create a method to which you pass the three initials and that displays the initials twice—once in the ...

**World history**

Why are you cheating on this test?

**American Government**

Tahahahaha Literally

**physical science**

Newton's second law. The heavier object has more mass, and acceleration is direc tly proportional to force and inversely proportional to mass.

**physical science**

Newton's second law. The heavier object has more mass, and acceleration is direc tly proportional to force and inversely proportional to mass.

**Physics**

the graph is not shown.

**Physics**

the graph is not shown.

**science physics solar**

. 6 x 72 because the voltages are additive in series.

**Calculus**

I = A/s^2 + 8A/(600-s^2) where I = illumination, s = distance from A, A is a constant Take the derivative of I relative to s, set to zero, and solve for s, the distance

**Math**

your question is not readable

**math: counting techniques**

Six problems (numbered 1 to 6) are set for a math test. A student can score 0, 1, 2, 3 points for each problem. Find the number of ways to score a total of 15 points for the six problems.

**Science**

work is defined as force (parallel to the motion) x distance The force in this case is the weight. Calculate the weight of the object, multiply x the distance. The force is up as is the distance, so they are both parallel.

**Science**

work is defined as force (parallel to the motion) x distance The force in this case is the weight. Calculate the weight of the object, multiply x the distance. The force is up as is the distance, so they are both parallel.

**Science**

work is defined as force (parallel to the motion) x distance The force in this case is the weight. Calculate the weight of the object, multiply x the distance. The force is up as is the distance, so they are both parallel.

**history**

Definitely B

**math**

Along the length there will be 7 posts on each side. The width will only need one post each. 7x2 + 1x2 = 16 posts total The length of the fence is the perimeter of the rectangle.

**math**

6L + 6B = 45 3L + 2B = 19 Solve the two equations for L and B, which are the price of leashes and brushes, respectively.

**physical science**

They are in opposite directions, so subtract to find the resultant force.

**science**

distance = 1/2 at^ a= 9.8 m/s/s. and t=2s plug in and find the distance it has dropped. subtract that distance from 80m to find the new height. PE = mgh, where h is the height. Plug in and find PE KE = 1/2 mv^2, so we need v after 2s The equation is v= vo + at, and vo=0 So, v...

**Physics**

We are given C1 and C2. V is the same across each capacitor, 300 V since they are in parallel. Q = CV for each capacitor. W = KE = 1/2 CV^2 for each capacitor

**PLEASE ANSWER!!**

If some of the vibrational waves of the earthquake have the same frequency or are a factor of the natural frequency of the buildings, then the buildings can start swaying in "tune" with the waves. It's like someone pushing a swing. The frequency of the push has ...

**Physics**

A great white shark of mass m1, coasting through the water in a nearly frictionless way at speed v1 engulfs a tuna of mass m2=0.10 m1 traveling in the same direction at speed v2 swallowing it in one bite. a) What is the speed of the shark after its meal? b) Did the shark gain...

**Physics**

A model rocket has a mass of 0.435 kg. It is mounted vertically and launches directly up with a thrust force of 13.1 N. a) What is the weight of the rocket? b) Determine the net force on the rocket as it is launched. c) What is the acceleration of the rocket at lift-off?

**math algebra**

At a college, records show that the average persons grade point average, G, is a function of the number of hours he or she studies and does homework per week h. The grade point average can be estimated by the equation : G=0.01h^2 +0.2h+1.2 To obtain a 3.2 GPA how many hours ...

**American Government**

LIFE SAVER

**math algebra**

A tax free municipal bond pays 4.75% compounded continuously. What is the value of a $2,000 bond after 30 years? Round your answer to the nearest cent. [Hint- A=P e^rt where P= present(initial) value, A= future value, r= annual rate, and t= number of years] P.S.The rt is an ...

**Math**

write 2 equations 30+25m and 300-20m set them equal to each other and solve for m

**MATLAB**

trying to make this program work, but it only works for the number 12.. % this program will determine if an integer is prime and determine % its prime factors function MAIN clear; clc; % define number(s) to be checked, call function, and print output N = 12; [answer,...

**anatomy**

false, it is a short term stress hormone. It deals with flight/fight response.

**math**

common denominator should be 12

**math**

just add 5/3 + 3/4 +1/2 = answer

**Chemistry**

To find total pressure since you have such a high pressure you have to treat the gases as non-ideal. this means that you have to find the pseudocritical temperature and pressure of the gas mixture which is T'c= Ya(Tca)+Yb(Tcb) and P'c= Ya(Pca)+Yb(Pcb) where Y is the ...

**matlab**

Im trying to figure out how to write a program that finds prime factors of a number. I have the following but it only works for the number 12 for some reason. % this program will determine if an integer is prime and determine % its prime factors function MAIN clear; clc; % ...

**algebra**

So this is what I got: (b+9)+b+c=82 that means that c= 82-((b+9)+b) putting it all together we have (b+9)+b+82-((b+9)+b)= 82

**science**

P= densityofwater*g*h + atmospheric pressure If you look at the units : m/s^2 * kg/m^3 * m this gives you kg/m*s^2 which is pressure in Pa

**algebra 2**

what do you mean it comes last

**algebra 2**

What is the sqaure root of -180x^8 I got 6x^4 i radical 5

**Math**

How do I find a value for k that will make the expression factorable. 36x^2 + 8x + k?

**math**

My average in AP world history is a 90, The weight on the class is 1.10% with the weight, whats my average?

**chem**

The noble has configuration for Ta is [Xe] 6s2 4f14 5d3 does the order in which i arrange the principle energy levels matter when i write the configuration? Like should it be [Xe] 5d3 6s2 4f14

**chem**

how is it 4s1?

**chem**

whats the noble has configuration for chromium? is it [Ar] 4s^2 3d^4

**Quick Physics Question**

Are both linear and angular momentum conserved in static equilibrium ?

**Computer Science**

Write a program that Will prompt a user to enter his/her name and number.use a while loop that will display the user name times the entered number

**math**

A certain number was increased 5 times, then decreased by 3, then halved. The result was 0.3 less than the original number. What was the original number?