Sunday
January 25, 2015

Posts by Anonymous


Total # Posts: 76,655

algebra
solve the system of equations using the substitution method 8x - 9 = y, y - 8x = 4
January 13, 2015

algebra
solve for x using the substitution method -8x + y = 18, 9x + 13y = 8
January 13, 2015

Chemistry
The overall reaction in a commercial heat pack can be represented as shown below. 4 Fe(s) + 3 O2(g) 2 Fe2O3(s) ΔH = -1652 kJ How much heat is released when 4.00 mol iron is reacted with excess O2? How much heat is released when 1.00 mol Fe2O3 is produced? How much heat is...
January 13, 2015

math
Thanks
January 13, 2015

math
Jill has a total of 12 1/2 hours of football practice after school five days a week. a. How many hours of practice will he have for 15 school days? I think the answer is 37 1/2 hours. b. How many hours of practice will he have for 22 school days? I think that the answer is 55 ...
January 13, 2015

math
According to the 2003 U.S. Census, approximately 129 million americans spend 3.4% of a 24-hour day commuting. How many minutes a day does a person in this group spend commuting?
January 13, 2015

Math
Jay's term paper is 18 pages long. If Madison's paper is 175% of the length of Jay's paper, find the length of Madison's paper.
January 13, 2015

SS
Why do less than half of the people in Russia possess a TV/radio?
January 13, 2015

math
Mr. Jenkins is going to buy museum tickets for a class trip. The museum director quotes him the following prices: • 20 tickets cost a total of $250. • 30 tickets cost a total of $375. • 50 tickets cost a total of $625. a. Based on these prices, is the cost of ...
January 13, 2015

Pre-Calc/Trig
nvm, i figured this one out
January 13, 2015

Pre-Calc/Trig
write an equation of the conic section: a hyperbola with vertices (0,-6) and (0,6) and asymptotes y=(3/4)x and y=(-3/4)x
January 13, 2015

English
Get an education, or you are doomed to flip greasy burgers for the rest of your life! Which propaganda technique is used in this sentence?
January 13, 2015

math,trigonometry
how do i state the law of sines and cosin in words ??
January 13, 2015

Algebra
Dhvdt sidekick when subway swings windup Kelly's webmail
January 13, 2015

physics
masses of 3,5,7,8 kg are suspended at equal distances of 1 m from rod.Find the CG of the arrangement.
January 13, 2015

Math
How to simplify (x-3)/(2x) - (4x + 3)/4?
January 13, 2015

Spanish
We have to sell it to her. 19. Tenemos que vendér BLANK. 20. BLANK tenemos que vender.
January 13, 2015

Math
x=4 dresses
January 12, 2015

Math
A total of 10,000 is invested into two funds paying 7.5% and 9% simple interest. The combined annual income for the two funds is $849. Determine how much is invested at each rate
January 12, 2015

Calculus
Find the point on the parabola x+y^2=0 that is closest to the point (0,-3).
January 12, 2015

Calculus
Okay, what are the rules for determining positive, negative, or zero?
January 12, 2015

Calculus
I get mixed up when graphing derivatives. If I'm given the graph of f how do I get f' and f"?
January 12, 2015

Math
(-y^2)^2= ?? Is it -y^4? A negative answer??
January 12, 2015

Physics
A particle with a mass of 1.55 kg is acted on by a force Fx acting in the x-direction. If the magnitude of the force varies in time as shown in the figure below, determine the following.
January 12, 2015

Physics
As shown in the figure below, cars #1 and #2 are sliding across a horizontal frictionless surface. The cars are equipped with a coupling arrangement similar to the one on railroad cars. Car #1 overtakes car #2 and they have a totally inelastic collision and become coupled ...
January 12, 2015

physics
Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are moving toward one another, the first having a mass of 160,000 kg and a velocity of 0.300 m/s, and the second having a mass of 115,000 kg and a velocity of -0.120 m/s. (The minus...
January 12, 2015

clothing an textiles
six ways in which control fullness in a garment explain any two methods
January 12, 2015

Physics
A 4.00-g bullet is moving horizontally with a velocity vector v = 348 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks resting on a horizontal frictionless surface. Air resistance is negligible. ...
January 12, 2015

physics
A 51.5-kg skater is traveling due east at a speed of 2.70 m/s. A 69.5-kg skater is moving due south at a speed of 7.50 m/s. They collide and hold on to each other after the collision, managing to move off at an angle θ south of east, with a speed of vf. Find the following.
January 12, 2015

Physics
An automobile has a mass of 2000 kg and a velocity of +12 m/s. It makes a rear-end collision with a stationary car whose mass is 1850 kg. The cars lock bumpers and skid off together with the wheels locked.
January 12, 2015

math/algebra
No
January 12, 2015

math/algebra
Mr. Jenkins is going to buy museum tickets for a class trip. The museum director quotes him the following prices: • 20 tickets cost a total of $250. • 30 tickets cost a total of $375. • 50 tickets cost a total of $625. a. Based on these prices, is the cost of ...
January 12, 2015

physics
Kevin has a mass of 77.5 kg and is skating with in-line skates. He sees his 21.00 kg younger brother up ahead standing on the sidewalk, with his back turned. Coming up from behind, he grabs his brother and rolls off at a speed of 2.18 m/s. Ignoring friction, find Kevin's ...
January 12, 2015

physics
ALLAN
January 12, 2015

physics
A 2.50 g bullet, traveling at a speed of 485 m/s, strikes the wooden block of a ballistic pendulum, such as that in the figure below. The block has a mass of 275 g.
January 12, 2015

physics
A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 270 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +2.6 m/s relative to the shore, and then hops onto an identical floating log that is ...
January 12, 2015

physics
An 85-kg jogger is heading due east at a speed of 2.0 m/s. A 55-kg jogger is heading 22° north of east at a speed of 2.7 m/s. Find the magnitude and direction of the sum of momenta of the two joggers.
January 12, 2015

math
A school band is having a fundraiser. Band members will sell coupon books for $10 each. The band earns $12.50 for every 5 coupon books that are sold. a. After the first week, the band members had sold 105 coupon books. How much money did the band members earn from the 105 ...
January 12, 2015

physics
A golf ball strikes a hard, smooth floor at an angle of θ = 26.4° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.047 kg, and its speed is 45 m/s just before and after striking the floor. What is the magnitude of the impulse applied to...
January 12, 2015

Math
and then what do you do to solve the problem??
January 12, 2015

Math
if x erasers have a weight of 80 grams, what is the total weight of 50 erasers?
January 12, 2015

legal research writings
Which of the following legal publications is NOT typically updated with pocket parts? A.Legal encyclopedias B.Legal dictionaries C.Digests D.Treatises I thought it was B The LexisNexis case abbreviation is: LX LN LE LEX I think it's LN
January 12, 2015

Chemistry
if 50 grams of sodium hydroxide mixed with 25 grams of hydrochloric acid how many grams of salt can be formed?
January 12, 2015

Math
A school band is having a fundraiser. Band members will sell coupon books for $10 each. The band earns $12.50 for every 5 coupon books that are sold. a. After the first week, the band members had sold 105 coupon books. How much money did the band members earn from the 105 ...
January 12, 2015

Make english sentences
Make sentences from avoid, honest and dwell
January 12, 2015

English
Make sentences from avoid, honest, dwell
January 12, 2015

physics
A 0.580-kg ball is dropped from rest at a point 1.60 m above the floor. The ball rebounds straight upward to a height of 0.650 m. What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?
January 12, 2015

physics
The acceleration of a particle which moves along the x axis is given by a=4x+5x^(3/2) The particle has speed of 2m/s when x=1m x is in meters a is in m/s^2 evaluate the velocity when x = 8m I know that I need to use kinematic eqn 3 adr = vdv then take the integral but I'm ...
January 12, 2015

Algebra
Solve the inequality. Graph the solution on a number line. -2 ≤ d + 0.5 ≤ 4.5
January 12, 2015

Math
The formula W = 35.74 + 0.6215T - 35.75V^4/25 + 0.4275TV^4/25 relates the wind chill temperature W to the air temperature T in degrees Fahrenheit and the wind speed V in miles per hour. Use a calculator to find the wind chill to the nearest degree when the air temperature is ...
January 12, 2015

math
Idk
January 12, 2015

Algebra
Write an equation in slope-intercept form of the line that contains the points in the table. X Y 1 9 4 10 7 11 13 13
January 12, 2015

Algebra
Write an equation in point-slope form of the line that has a slope of 1/2 and passes through the point (5, -2).
January 12, 2015

Algebra
neither?
January 12, 2015

Algebra
Tell if the following pair of lines is parallel, perpendicular, or neither. 3x - 2y= 16 y= -2/3x + 4
January 12, 2015

Algebra
Write an equation of a line that is parallel to y = 3x – 5 and goes through the point (3, 1).
January 12, 2015

Math
How to simplify 5^(4/3)? by writing it in radical form?
January 12, 2015

Math
I mean when 2 is the index.
January 12, 2015

Math
Is 2square root 6 the same as square root 6?
January 12, 2015

Algebra
The Badys and their maid, Alice, took a trip to Hawaii for their summer vacation. The travel agent told Ike that the trip would cost $210 for each child plus another $315 per adult. According to Ike Bady’s credit card receipt, the trip cost a total of $2205 for all 9 of ...
January 12, 2015

Math
What transformation happens from In x to 3 In x? Also, I had thought that 3 In x and In x^3 are the same, but the graphics calculator shows otherwise.
January 12, 2015

Please check my Calculus
I don't know if you will see this but Is number 3's answer D?
January 12, 2015

Please check my Calculus
1. Find the value(s) of c guaranteed by Rolle’s Theorem for f(x)=x^2+3x on [0, 2] A. c=-3/2 B. c=0, 3 C. Rolle’s Theorem doesn’t apply as f is not continuous on [0, 2] D. Rolle’s Theorem doesn’t apply as f(0) does not equal f(2) E. None of these I got ...
January 12, 2015

soc102
the relatvivist would agree with which statement about stem cell
January 12, 2015

Please check my Calculus
1. Which of the following describes the behavior of f(x)=x^3-x A. Relative maximum: x=0 B. Relative maximum: x=(1/sqrt(3)); Relative minimum: x=(-1/sqrt(3)) C. Relative maximum: x=(-1/sqrt(3)); Relative minimum: x=(1/sqrt(3)) D. Relative minimum: x=0 E. none of these I got C. ...
January 12, 2015

us history
A
January 12, 2015

Please check my Calculus
1. Find all points of inflection of the function f(x)=x^4+x^3 A. (0, 0) and (-½, -1/16) B. (-½, -1/16) C. (0, 0) D. (0, 0) and (-¾, -27/256) E. none of these I got A. I found the second derivative and solved for x and plugged in the values to find the ...
January 12, 2015

chemistry exercises
The concentrated H2SO4 of 155g dissolved in enough amount of water if acidic solution is 2.3L a) what is the mole of H2SO4 b) what is the concentration H2SO4 c) what is the concentration of H+(H3O+) created in the solution d) what is the PH value of solution e) what is the ...
January 12, 2015

chemistry
2) At 298K, what are the molarities of pure water?
January 12, 2015

chemistry
The concentrated H2SO4 of 155g dissolved in enough amount of water if acidic solution is 2.3L a) what is the mole of H2SO4 b) what is the concentration H2SO4 c) what is the concentration of H+(H3O+) created in the solution d) what is the PH value of solution e) what is the ...
January 12, 2015

Please check my Calculus
1. Find all points of inflection of the function f(x)=x^4-6x^3 A. (0, 0) B. (0, 0), (9/2, -2187/16) C. (3, -81) D. (0, 0), 3, -81) E. none of these I got D. I found the second derivative and solved for x and plugged values into original function to get points. 2. Find dy/dx ...
January 12, 2015

Please check my Calculus
That's a nasty one, all right. f"(x) = 12(240x^6-36x^4-178x^2+5)/(12x^4-2x^2+15)^3 so the numerator is a cubic in x^2, not easy to solve. Not sure why they threw this curve ball.
January 12, 2015

Please check my Calculus
When I solve 1 without a graphing utility I one get 2 inflection points. How do you get the other two without a graphing utility. Not allowed to use calculators for this.
January 12, 2015

Please check my Calculus
1. Find all points of inflection: f(x)=1/12x^4-2x^2+15 A. (2, 0) B. (2, 0), (-2, 0) C. (0, 15) D. (2, 25/3), (-2, 25/3) E. none of these I got D. I found the second derivative and equaled it to 0 and solved for x. I plugged the x values in to get my points. 2. Find the ...
January 12, 2015

Please check my Calculus
#1 ok #2 f' = -3x^2+36x-105 = -3(x^2-12x+35) = -3(x-5)(x-7) f'>0 on (5,7), so D is correct #3 y' = 1+sinx y'=0 only at x = 3pi/2, so (D) is correct
January 12, 2015

Please check my Calculus
1. Given f(x)=-6/x, choose the correct statement A. The graph of f is concave upward on the interval (negative infinity, 0) B. The graph of f is concave downward on the interval (negative infinity, 0) C. The graph of f is concave upward on the interval (negative infinity, ...
January 12, 2015

Chemistry (Acid-Base)
2) At 298K, what are the molarities of pure water?
January 12, 2015

Please check my Calculus
1. Find all critical values for f(x)=(9-x^2)^⅗ A. 0 B. 3 C. -3,3 D. -3, 0, 3 E. none of these I got D. I found the derivative and solved for critical numbers. 2. Find all intervals on which the graph of f(x)=(x-1)/(x+3) is concave upward A. (negative infinity, infinity) ...
January 12, 2015

Please check my Caclulus
1. Find all intervals on which the graph of y=(x^2+1)/x^2 is concave upward. A. (negative infinity, infinity) B. (negative infinity, -1) U (1, infinity) C. (negative infinity, 0) U (0, infinity) D. (1, infinity) E. none of these I got C. I found the second derivative and used ...
January 12, 2015

Calculus
Find the absolute maximum and absolute minimum of f on the interval (-4, -1]: f(x)=(x^3+8x^2+19x+12)/(x+4) A. Maximum: None; Minimum: (-2, -1) B. Maximum: (-4, 3); Minimum (-1, 0) C. Maximum: (-4, 3); Minimum: (-2, -1) D. Maximum: None; Minimum: (-1, 0) E. none of these
January 11, 2015

Calculus
Find the values of x that give relative extrema for the function f(x)=3x^5-5x^3 A. Relative maximum: x= 1; Relative minimum: x=sqrt(5/3) B. Relative maximum: x=-1; Relative minimum: x=1 C. Relative maxima: x=+or- 1; Relative minimum: x=0 D. Relative maximum: x=0; Relative ...
January 11, 2015

chemistry college
At a constant temperature of 20oC and the partial pressure of 760 mmHg, the solubility of CO2 in water is 0.169g per 100mL. If the partial pressure is changed to 43,000 mmHg, what is the solubility of CO2?
January 11, 2015

Measurement
Thanks.
January 11, 2015

Mechanics
When electrically testing a rotor with an ohmmeter, you should check for shorts, ground, and what?
January 11, 2015

math
It's B
January 11, 2015

Patton Fuller
Identify GAAP applied to the health care industry.
January 11, 2015

Algebra 2
Find the equation of the line that is perpendicular to y=5 and passes through the point (2,3).
January 11, 2015

Legal research
Which of the following legal publications is NOT typically updated with pocket parts? A) Legal encyclopedias B) Legal dictionaries C) Digests D) Treatises I believe it's D. But then again I thought it maybe C.
January 11, 2015

Legal research
The most familiar method of locating law review and legal periodicals is the __________ to Legal Periodicals and Books. A. Collection B. Compilation C. Index D. Digest Digest?
January 11, 2015

chemistry
if the average concentration of PCBs in the body tissue of a human is 4.0 ppm, what mass of the PCB is present in a 64 kg person? is this a significant amount in regards to the health of the person? What is the concentration of a solution of sodium nitrate that contains 35.0 g...
January 11, 2015

chemistry
if the average concentration of PCBs in the body tissue of a human is 4.0 ppm, what mass of the PCB is present in a 64 kg person? is this a significant amount in regards to the health of the person? What is the concentration of a solution of sodium nitrate that contains 35.0 g...
January 11, 2015

Legal research
The LexisNexis case abbreviation is: A. LN. B. LX. C. LE. D. LEX. is it A?
January 11, 2015

Writing/English
What are some tips on writing in an embarrassed tone?
January 11, 2015

Chemistry
How many mL of 0.5 M HCl(aq) are needed to neutralize a 288 mL solution of 0.25 M NaOH?
January 11, 2015

Calculus
Use the graph of f(x)=x^2/(x^2-4) to determine on which of the following intervals Rolle’s Theorem applies. A. [0, 3] B. [-3, 3] C. [-3/2, 3/2] D. [-2, 2] E. none of these I know what the Rolle's Theorem is but I'm unsure on how you know if the function is ...
January 11, 2015

Calculus
Let f(x) be a polynomial function such that f(4)=-1, f’(4)=2 and f”(4)=0. If x<4, then f”(x)<0 and if x>4, then f”(x)>0. The point (-4, -1) is which of the following for the graph of f? A. relative maximum B. relative minimum C. critical value D...
January 11, 2015

Spanish
Explain El Zócalo and its importance.
January 11, 2015

Calculus
Let f(x) be a polynomial function such that f(-2)=5, f’(-2)=0 and f”(-2)=3. The point (-2, 5) is which of the following for the graph of f? A. relative maximum B. relative minimum C. intercept D. inflection point E. none of these
January 11, 2015

Calculus
How do I solve it analytically? I'm still confused.
January 11, 2015

Calculus
Which statement is NOT true of the graph f(x)=(x+1)(x-3)^2? A. f has a relative maximum at (⅓, 256/27) B. f has a point of inflection at (3, 0) C. f has an intercept at (3, 0) D. f has a relative minimum at (3, 0) E. none of these For f'(x) I got 3x^2-10x+3 For f&...
January 11, 2015

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