# Posts by JB

Total # Posts: 83

**Trig**

(Tan^2 x) - 2 tan x - 3 / tan x + 1

*March 5, 2017*

**Math**

jeff has 12 more toy cars than toy trucks. In all, he has 19 toy vehicles. How many toy trucks does Jeff have?

*January 24, 2017*

**Math**

jeff has 12 more toy cars than toy trucks. In all, he has 19 toy vehicles. How many toy trucks does Jeff have?

*January 23, 2017*

**math**

Sarah bought 2 boxes of pencils. There were 58 pencils in each box. In the first box, 23 of the pencils were red, 18 were blue, and the rest were yellow.

*December 1, 2016*

**math**

if m set of 22 mathematics teachers and p is the set of 25 physics teachers and if 2 teachers both mathematics and physics, how many elements has MUP.

*July 5, 2016*

**physics**

A space station consists of two donut-shaped living chambers, A and B, that have the radii shown in the drawing. As the station rotates, an astronaut in chamber A is moved 1.99 102 m along a circular arc. How far along a circular arc is an astronaut in chamber B moved during ...

*April 4, 2016*

**PRECALC**

4. REVIEW: Let f(x) = 2^x and g(x) = √(x − 7). Find and simplify completely. a. )( f(3+h)-f(3) )/8h b.) (g ◦ f)(5) / (f ◦ f)(3)

*March 26, 2016*

**precalc**

Solve the equation. (Enter your answers as a comma-separated list.) 5x^2e^(−2x) − 3x^3e^(−2x) = 0

*March 15, 2016*

**precalc**

Solve the equation. (Enter your answers as a comma-separated list. Round your answers to four decimal places.) 2^x − 8(2^−x) + 2 = 0

*March 15, 2016*

**precalc**

2^(3x + 1) = 3^(x − 2) (a) Find the exact solution of the exponential equation in terms of logarithms.

*March 7, 2016*

**precalc**

Solve the logarithmic equation for x. (Enter your answers as a comma-separated list.) log2(x + 17) − log2(x − 2) = 1 2 is the base for the log.

*March 7, 2016*

**Banking Finance**

Higher

*March 1, 2016*

**chem**

Calculate the amount of heat required to raise the temperature of a 65-g sample of water from 32∘C to 65∘C. (The specific heat capacity of copper is 4.184 J/g∘C.) Q=M*C*delta T 65g*4.184*(65-32) 89.7 J

*January 31, 2016*

**AP Physics**

A car traveling in a straight line has a velocity of 3.24 m/s at some instant. After 3.28 s, its velocity is 8.18 m/s. What is its average acceleration in this time interval? Answer in units of m/s 2 .

*November 6, 2015*

**physics**

how do you plot T2 2.14, 2.10, 2.08, 2.03, 2,20 and 2.30 and length .445, .54m, .497m, .50m, .53m and .555m on a graph and how do you find the gradient

*October 25, 2015*

**English**

Which sentence most clearly exhibits bias? A. The professor’s points appear to be based on outdated research. B. If my argument is true, Blake’s argument is clearly false. C. Few would disagree that poor people are incapable of rational thinking. D. When a major ...

*March 7, 2015*

**English**

“Nature is bountiful, which is why logging should be strictly regulated.” Which logical fallacy is illustrated in this sentence? A. Ad hominem B. Non sequitur C. Post hoc ergo propter hoc D. Red herring

*March 7, 2015*

**public speaking**

Demographics is important to know your: A. speech. B. topic. C. audience. D. location of speaking event.

*December 20, 2014*

**chemistry**

An aqueous solution of cobalt(II) nitrate has a concentration of 0.471 molal. The percent by mass of cobalt(II) nitrate in the solution is %.

*August 21, 2014*

**chemistry**

How many grams of NiI2 are there in 263 grams of an aqueous solution that is 33.5 % by weight NiI2.

*August 21, 2014*

**chemistry**

How many grams of NaOH are there in 187 grams of an aqueous solution that is 7.06 % by weight NaOH.

*August 21, 2014*

**English**

All of these are ways to correct comma splices, run-ons, and fused sentences except A. join two independent clauses with a coordinating conjunction. B. separate the two clauses with a period. C. join two independent clauses with a subordinating conjunction. D. join the two ...

*May 29, 2014*

**science pls help**

are these the correct answers

*March 13, 2014*

**physics**

A 58.2 g object is attached to a horizontal spring with a spring constant of 11.8 N/m and released from rest with an amplitude of 24.4 cm. What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless?

*February 24, 2014*

**grammar**

The carriage has crossed the bridge and arrived at the mansion. The carriage crossed the bridge and has arrived at the mansion. ???

*December 10, 2013*

**grammar**

directions: rewrite the 2 sentences as 1 sentence by combining the main verbs and helping verbs...The carriage has crossed the bridge. The carriage has arrived at the mansion.

*December 10, 2013*

**Business**

Which of the following statements about the money invested in a traditional IRA account is correct? A.it isn't taxed until it's withdrawn. B.it's subject to double taxation. C.it's taxed as you make deposits. D.it isn't taxed.

*November 21, 2013*

**Public speaking**

no 2 is B

*March 28, 2013*

**College Physics**

A block weighing 70.0 N rests on a plane inclined at 25.0° to the horizontal. A force F is applied to the object at 50.0° to the horizontal, pushing it upward on the plane. The coefficients of static and kinetic friction between the block and the plane are, ...

*October 9, 2012*

**College Physics**

A rifle bullet with a mass of 17.5 g traveling toward the right at 293 m/s strikes a large bag of sand and penetrates it to a depth of 23.6 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.

*October 9, 2012*

**public speaking**

D is wrong

*September 27, 2012*

**Physics**

please help me if you can. I have no values, just diagrams. the first diagram: a box is attached to a rope and pulled along a floor with the rope parallel to the floor. The second diagram: a box is attached to a rope and pulled along a floor with the rope at an angle (upwards...

*September 24, 2012*

**Physics**

well I have 3 diagrams and I'm supposed to rank them in order of strongest normal force to weakest normal force, so I'm just not sure how to tell which is the strongest.

*September 24, 2012*

**Physics**

How can you tell which force diagrams have a strong normal force and which ones have a weak normal force?

*September 24, 2012*

**physics**

if the reaction time is 10.0s, how far will the car travel before hitting the brakes? Vf = 27.42 m initial speed = 80 km/hr coefficient of friction = 1.00

*June 25, 2012*

**Business HELP!!!**

Number 8 is D

*May 25, 2012*

**AAT**

those are supposed to be square root symbols. I'm not sure what happened...

*April 8, 2012*

**AAT**

ã3tanx=3tanxcscx-ã3tanx

*April 8, 2012*

**Chemistry**

Thank you so much! Another question, the directions say, Determine the [H3O] and [OH] of each of the following solutions. Lime Juice, pH= 1.9 Kitchen Cleaner, pOH= 4.75 Tomato Juice, pH= 4.23 How do I do this?

*April 4, 2012*

**Chemistry**

I think i figured it out, would the pH be .9?

*April 4, 2012*

**Chemistry**

hi DrBob222, thanks for your help. I understand that part, but how do you solve it using only the molarity?

*April 4, 2012*

**Chemistry**

what are the pH and the pOH of 0.125M HCIO4?

*April 4, 2012*

**math**

solve for sine theta of 3.14/3

*March 21, 2012*

**statistics**

about 13% of the population is nervous around strangers. If 2 people are randomally seclected, what is the probability that both are nervous around strangers?

*January 21, 2012*

**College Algebra**

Verify the function f and g, are inverses of each other by showing that f(g(x))=x and g(f(x))=x Graph the functions. f(x)=6/(1-x) g(x)=(1-6/x)

*January 3, 2012*

**Rational Zeros**

List all possible rational zeros for the polynomial below. Find all real zeros of the polynomial and factor f(x)=2x^4+19x^3+37x^2-55x-75

*January 2, 2012*

**Functions/End behavior**

f(x)=x^2(x^2-2)(x+2) Determine the end behavior, find the power function that the graph of f resembles for large values of |x| Find the maximum number of turning points

*January 2, 2012*

**Functions of f(x)**

Given the two functions f(x)and g(x)‚0 for all x, explain how to find (f+g)(x),(f-g)(x),(f*g)(x), and (f€g)(x).Demonstrate examples for all: f(x)=(-x)/(6)-3(5+3x)/(8)-3x f(0)=-15/8

*January 1, 2012*

**statistics**

38

*November 14, 2011*

**Living Environment**

having a hard time finding this information on google and i really need help for some questions. What are 3 abiotic factors that influence the: Highlands of Ethiopia Patagonia The Rockies Pakistan and the Himalayas Forests of Eastern China

*November 8, 2011*

**Chemistry**

I'm trying to figure out the formula for one liter of 1M K2HPO4 (Potassium Phosphate Dibasic). I know the amount of K2HPO4 is 174.18grams and you make it to equal one liter with dH2O, but I can't find where anyone has actually written the amount of dH2O to use. Without...

*June 6, 2011*

**history**

thanks really just trying to get my thesis statement straightened out its a very broad subject

*May 9, 2011*

**history**

how has "liberty and justice for all" changes from 1492 to 1865? may include race, class, religion, politics, gender, economics, culture

*May 9, 2011*

**English**

Casual Wear is popular with American teenagers for sure.

*March 30, 2011*

**literature**

summarize the major similarities and differences between the forms of drama, poetry, and the short story. Demonstrate your ideas with textual examples from the course readings. In your response, include at least one example of each literary form.

*March 22, 2011*

**Science**

Thank you, J-B-

*March 7, 2011*

**Science**

please delete my question

*March 7, 2011*

**Science**

how long does it take for one water molecule to complete the water cycle?

*March 7, 2011*

**physics**

A ball is thrown straight upward and then returns to the earth. choosing the positive direction to be upward, sketch a graph of the velocity of this ball against time. where does the velocity change direction? Explain?

*February 24, 2011*

**physics**

a rock is dropped from the top of diving platform into the swimming pool below. will the distance traveled by the rock in a 0.1 second interval near the top of the flights be the same as the distance covered in a 1.1 second interval just before it hits the water? Explain?

*February 24, 2011*

**chemistry**

when you add manganese dioxide to hydrogen peroxide does the temperature decrease or does it form a precipitate?

*September 24, 2010*

**algebra**

x=150 electric tower

*August 22, 2010*

**science**

Can someone explain to me using a formula, why an increase in carbon dioxide makes the blood more acidic.

*April 28, 2010*

**bio**

the systemtic system of the heart sends oxygenated blood and nutrients to all body cells. If the questions were does it send oxygenated blood and nutrients to all body tissue would the answer be yes or no. cells make tissues so would it be yes?

*February 1, 2010*

**english**

Thank you for your help.

*January 20, 2010*

**english**

Where should the commas be placed in this sentence? Players came from places such as Red Hill Pennsylvania and Popular Point Manitoba Canada.

*January 20, 2010*

**precalculus**

the vertex of y^2 - 8y + 24 = x is... (9,3) (24,0) (8,4) (4,8) or none of these

*December 6, 2009*

**precalculus**

which conic section is this the equation for? 3x^2 - 9x + 2y^2 = 15

*December 6, 2009*

**physics**

It has been suggested that rotating cylinders about 12 mi long and 5.4 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth?

*November 21, 2009*

**Algebra**

Great explanation. I totally get it now. I think I can actually finish the rest. Thanks for your help!

*November 13, 2009*

**Algebra**

A total of 475 tickets were sold for the school play. There were 75 fewer student tickets sold than adult tickets. How many adult tickets were sold?

*November 13, 2009*

**PreCalc (Just Can't Comprehend)**

If P = 2x + 2y and xy=400, then the perimeter is P(x)=2x + 800/x. In a pre-calc course you could only be expected to find the minimum value of P(x) by inspection of a graph. See the "graph of p = 2x + 800/x from 0 to 40" at wolfram alpha. OR, by creativity ... The ...

*November 1, 2009*

**English**

Calm Thank you for your help

*October 22, 2009*

**English**

What are the predicate adjectives in this sentence? The charmer must remain calm as the cobra flares its hood menacingly.

*October 22, 2009*

**Language**

Are these two sentences complete or incomplete? A large red fox with its young. A day sunbathing on the beach.

*August 22, 2009*

**science**

CellTheory

*October 7, 2008*

**acrostic poems**

ooo ya

*May 27, 2008*

**Chemistry**

Hi there. I'm doing a paper on Biology (yes I know, will explain the chem link in a sec) and in it am trying to find the best pH level for Slaters, using limewater and filtered water to change concentrations. I have done experiments and using bunch of ratios (eg 2 parts ...

*May 7, 2008*

**social studies**

Britain I believe

*May 6, 2008*

**Physics EM**

Physics2212 students... lets all protest against mastering physics.

*March 10, 2008*

**Medical**

It was discovered that a medical assistant discussed the medical condition of a high-profile individual in public. This resulted in the condition becoming publicized information. What were the influential factors in this situation for the medical assistant? Thanks in advanced JB

*January 23, 2008*

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