Tuesday
December 6, 2016

Posts by Bob

Total # Posts: 3,137

math
Find all values of x such that x^2-5x + 4=0. If you find more than one value, then list your solutions in increasing order, separated by commas.
December 1, 2016

calculus
suppose that c(x)=3x^3 - 12x^2 +9000x is the cost of manufacturing x items. find a production level that will minimize the average cost of making x items
November 21, 2016

physics
A skate boarder traveling at a constant speed of 22 m/s on a road comes to a straight incline with a constant slope (do not use g for incline). While going up the incline, the skater has constant deceleration. If she is 16m up the incline after 12.0 s A) what is the ...
November 20, 2016

math
rate = L/H rate = 100L/H therefore: 100 = 550/H H = 550/100 = 5.5 hours.
November 20, 2016

Physics
You demonstrate hitting a board in a karate class. The speed of your hand as it hits the thick board is 12 m/s with respect to the board, and the mass of your hand is about 0.74 kg. How deep does your hand go into the board before stopping if the collision lasts for 2.0×...
November 19, 2016

fraction
I'm trying to find the common denominator for these numbers 5/7 4/9 2/3
November 18, 2016

Morales
A black rectangular box is 8 inches longer than it is wide. A green rectangle box is 3 inches wider than the black box but it has the same length. The area of the green box is 39 square inches more than the area of the black box.
November 17, 2016

Morales
A black rectangular box is 8 inches longer than it is wide. A green rectangle box is 3 inches wider than the black box but it has the same length. The area of the green box is 39 square inches more than the area of the black box.
November 16, 2016

English please help
are these right?
November 15, 2016

Math
Indira predicts that the actual difference of 19 - 7.82 will be greater than the estimate of 19 - 8 = 11. Indira correct ? Explain how Indira might have arrived at that prediction without subtracting the actual numbers.
November 15, 2016

Math
AA climbing gym charges $10 to climb each day.A pair of climbing shoes costs $84.it costs $169 to buy 6 days of climbing,one pair of climbing shoes,and one harness.how much does a harness cost
November 14, 2016

Physics
A hamster is pushed off a cliff by wind. Its mass is 0.040 kg and has a Potential Energy of 98 J. Find the kinetic energy.
November 11, 2016

Math
Write an equation to model: The temperature of hot water placed in the freezer is 80 'C and it decreases at a rate of 8' C per hour
November 9, 2016

Physics: Centre of Mass
Three masses of 4.0 kg, 5.0 kg and 7.0 kg are located on a line at positions +4.0, +8.0, and -5.0 in meters from the origin, respectively. Where is the center of mass of these three masses? With respect to the origin as x = 0, I calculated the center of mass to be: (4.0 kg)*(4...
November 8, 2016

American Government
BLESSSED
November 8, 2016

American Government
Life saver!!!!^
November 7, 2016

Chemistry
A cold pack manufacturer has decided to change the chemical in their cold pack from ammonium nitrate to ammonium chloride, a safer chemical. The original cold pack formulation used 100.0g of room temperature (27.0C) water and 35 g of ammonium nitrate. Assume that the solution ...
November 3, 2016

math
Which of the following phrases would represent this expression? x/3
November 2, 2016

Math
do ur hw scrub
November 2, 2016

math
In 2007, the population of a town was approximately 35,250. In 2012, the population of the town had decreased to 28,200. Based on a linear model, what will be the approximate population of the town in 2014? Please i need help with this i don't understand.
November 1, 2016

maths
A farmer has 120 metres of fencing. He is going to make a rectangular enclosure PQRS with the fencing. He is also going to divide the enclosure into two equal parts by fencing along MN. SNR The width of the enclosure is x metres. The length of the enclosure is y metres. (a) (i...
November 1, 2016

Science
NaNa was right.
October 31, 2016

math
if the of musician in a fanfare is between 21 and 49. which way does the musician have to stand to form the biggest number of rectangle
October 30, 2016

thermodynamics
what is enthalpy of pure ethly alcohol at 1atm?
October 29, 2016

physics
computer-controlled display screens provide drivers in the Indianapolis 500 with a variety of information about how their cars are performing. for instance, as ac car is going through a turn, a speed of 221 mi/h (98.8m/s) and centripetal acceleration of 3.00g are display. ...
October 27, 2016

statistics
Suppose the average weight for population of men is 178 pounds. You draw a random sample of 10 men and record the following weights: 150, 145, 180, 200, 175, 190, 142, 175, 240, 150. Calculate the sampling error.
October 27, 2016

Math
In this 2x3 grid, each lattice point is one unit away from its nearest neighbors. A total of 14 isosceles triangles(but not right triangles), each with an area of ½u squared have only two vertices that are one unit apart in the grid. how many such half-unit triangles ...
October 25, 2016

Maths
When the plane is directly above the runway, it is at an altitude of 652.7m
October 13, 2016

Math
my divisor is 10. greatnessthan4 times 5 . I am greater than 4 times 5 my remainder is 1 . what dividend am I.
October 11, 2016

Chemistry
the answer to 3# is D
October 10, 2016

PLEASE HELP HISTORY
These answers are 100% RIGHT^^
October 5, 2016

physical science
a car travels 50km east in 30 mins. what is the velocity in km/h
October 2, 2016

math
Paige spent a total of $60 on clothing items. She bought 2 pairs of shorts for $10 each. She bought some T-shirts for $4 each. She also bought some sandals for $12 each. How many of each clothing item did she purchase?
September 29, 2016

american Government
BLESSED US^^^
September 25, 2016

american government
Correct answers ^^
September 24, 2016

check my work
BDA y'all we blessed
September 23, 2016

math
1. Which of the following numbers is a rational? A. 4/5 B. square root of 27 C. 4.02002000200002... D. Square root of 31 2. Which type of number is shown below? 0.313311333111... A. repeating decimal B. rational C. irrational D. terminating decimal 3. Select all the rational ...
September 21, 2016

World History
NVM! B D IS CORRECT OPS XD
September 14, 2016

World History
6. Is c, d not b, d
September 14, 2016

Government
^^^OCA was totally correct^^^^ Thanks so much
September 12, 2016

physics
A particle is traveling counterclockwise in a circle of radius r = 2.30 m. At some instant in time, the particle is located by the angular coordinate α = 24.0°, the total acceleration has a magnitude of a = 15.0 m/s2 and is directed at an angle β = 20.0° with...
September 10, 2016

stuff
is hair biotic or abiotic
September 9, 2016

english
"I hear American siniging the varied carols I hear" Is this a) onomatopea b) anaphora c)Aliteration d)Antithesis E) Personification I think it is personification because Americaa is not a person therefore it can't sing?
September 9, 2016

math
Water contained by a dam exits a spill-way 685ft above the base of the dam. Determine the velocity of the water as it strikes the base of the dam if its initial velocity as it leaves the spillway is negligible.
September 8, 2016

history
1. A & C 2. A & C 3. B
September 8, 2016

Algebra II
What is the standard deviation of the data set? Round the answer to the nearest tenth. 5, 9, 11, 4, 8, 9, 12
September 7, 2016

biology
explain the following statement: "life is complex on the molecular level"
August 31, 2016

math
The coach of a baseball team separates the players into groups for drills. Each group has the same number of players. Is the total number of players on baseball team prime or composite? Explain.
August 30, 2016

Social Studies (Check Answers) Last Time
Thank you, Kaleb. All of your answers are right.
August 25, 2016

History
What can we learn from reading ancient greek dramas?
August 24, 2016

Math
Find the real part of (sqrt{3} - i)^{2011}.
August 24, 2016

Math
Find the imaginary part of (cos12 degrees +i*sin12 degrees +cos48 degrees +isin48 degrees)^6.
August 23, 2016

American government
its ADDC
August 23, 2016

American Government
No Number 1 is B
August 21, 2016

Lead Skls Dev
Haileab Asgedom lived a wild young adulthood primarily due to the lack of parental figures in his life. What did he say was his greatest regret about this period in his life?
August 18, 2016

Social studies (Ms.Sue are these correct?)
13.is c and 16. is a
August 17, 2016

Social Studies (check my answers)
Does anyone have the right answers??
August 4, 2016

Math
It is saying it is wrong where have i messed this up?
July 30, 2016

Math
I think it is 9. Am I right?
July 30, 2016

Math
A lattice point is a point with integer coordinates. How many lattice points (x,y) with -100 less than or equal to x less than or equal to 100 and -100 less than or equal to y less than or equal to 100 are on the graph of the parametric equations x=30-40 cos t y=-50 + 30 cos t...
July 30, 2016

Math
Let G be the graph of the parametric equations x = cos(4t), y = sin(6t). What is the length of the smallest interval P such that the graph of these equations for all t E P produces the entire graph G?
July 30, 2016

Math
Yeah sorry I don't know why it keeps happening.
July 30, 2016

Math
1. The graph of the parametric equations x= 2-3t, t= -1+5t is a line. What is the slope of this line? Please help!!!!!
July 30, 2016

Math
Sorry it was a typo it was the first one thanks a lot!!!
July 29, 2016

Math
At what point does the graph of the parametric equations y=3-2t, y=-2+5t intersect the graph of the parametric equations x = -1+3s,y=5-9s. The answer is the point of intersection (x,y). Please help! I am really confused!
July 29, 2016

math
The amount of medicine ingested by the body is a function given by A(t)= 5/6 (12t-t^2) Estimate the slope of the tangent at the point (4, 80/3). Use an interval of 0.01. Explain what the value represents for this situation.
July 24, 2016

Math please help!!
In most geometry courses, we learn that there's no such thing as "SSA Congruence". That is, if we have triangles ABC and DEF such that AB=DE, BC=EF, and ∠A=∠D, then we cannot deduce that ABC and DEF are congruent. However, there are a few special ...
July 19, 2016

Math
ABC is an equilateral triangle with side length 4. M is the midpoint of BC, and AM is a diagonal of square ALMN. Find the area of the region common to both ABC and ALMN.
July 17, 2016

Math
If Jane walks North for 3 miles, turns 45 degrees to the right, and then walks another 4 miles, how many miles will Jane be from her starting point? Give your answer as a decimal rounded to the nearest hundredth. Plz help!!!!
July 17, 2016

Math
The sound intensity of a soft whisper is about 1/200000 of the sound intensity of a shout. What is the decibel level of a whisper if a shout has a loudness level of about 85 dB? L = 10log(i1/10^-12)
July 14, 2016

Chemistry
alculate the amount of energy released in the formation of one mole of MgSe bonds (not lattice energy). The radius of the magnesium ion is 0.65 Å, and the radius of the selenide ion is 1.98 Å. Note that 1Å=10−10m
July 3, 2016

Maths
In class 8m, there are 27 pupils. There are twice as many boys as girls. How many boys are there?
July 3, 2016

Math
Katie makes 65% of her shots from the free throw line. Can you determine how many consecutive free throws she must make in order to increase her percentage to 68%? Explain.
July 2, 2016

math
6/5
June 30, 2016

Calculus
I meant to say it is a piecewise function
June 27, 2016

Calculus
What kind of discontinuity is this: F(x)= (2x^2 - 5x -3)/(x-3) if x does not equal 3 6 if x=3 It is a pieces use function. I thought it was removable but my answer key says it is a jump discontinuity. This is from an exam review and I want to get it right.
June 27, 2016

Math
Thanks steve!!!! It is correct! Also thanks Damon for giving this an attempt!
June 26, 2016

Math
It is saying that 39/12 which is 13/4, is wrong.
June 26, 2016

Math
The sum of the three smallest positive values of theta such that 4(cos*theta)(sin*theta) = 1 is k*pi. Find k. Help!!!!!
June 26, 2016

Math
Thanks! Actually, I had like the same method as you for like the first few steps then I had a miscalculation
June 26, 2016

Math
If sin (a) +cos (a) =1.2, then what is sin(a)^3 + cos(a)^3? I was having some trouble with this problem. I got .98 as an estimate. Why is this wrong!!!1
June 26, 2016

Math
the answer is 15 because 15*5=75 75-5 ( the 5 you got wrong) = 70
June 19, 2016

math
the answer is 30
June 19, 2016

area of a circle
What is the aera of the circle whose center is at (2,3) and that's tangent to x-axis?
June 18, 2016

math
How many possible points so that the x-coordinate an the y-coordinate are additive inverses of each other, and the differnce of the coordinates is 10.
June 17, 2016

English
Write a speech in the following situation- You are the leading actor in a school play It is the interval in the play. The first half was dreadful, with actors forgetting their lines, props falling over and the audience laughing for the wrong reasons..‟ Use a range of ...
June 15, 2016

uncc
A projectile fired at 30 degrees with a velocity if 15 m/s would have an x-velocity component of????m/s and a y-velocity component of????m/s. Please help.. thank you
June 6, 2016

English
Khianna is preparing an informational presentation for her science class. Her presentation discusses three different theories about what killed the dinosaurs 65 million years ago. The first theory is that an asteriod hit the earth, the second theory is climate change, and the ...
June 3, 2016

5th Grade Math - Urgent Part II
Peace
June 2, 2016

Math
9 + 10 = 21!!!!
May 31, 2016

Topic
I need an acrostic poem for the word PAGANISM. Can I have some help please?
May 21, 2016

physical science
John is using a pulley to lift the sail on his sailboat. The sail weighs 150 N, and he must lift it 4.0 m. How much work must be done on the sail?
May 16, 2016

language arts
Is it better or correct to write like this: A. "...would be the classic idea box..." or this? B. "...would be the classic, idea box..."
May 16, 2016

6th grade math - Ms. Sue please check!
You're right Lily Longoria
May 13, 2016

Career Research and Decision Making
A. an intrinsic career value. B. an extrinsic career value. C. a lifestyle value. D. a self-discovery exercise. A or B
May 13, 2016

Career Research and Decision Making
Mai is looking for a career that lets her travel and spend time in other countries. For Mai, work-related travel is:
May 13, 2016

Career Research and Decision Making
Maybe D
May 13, 2016

Career Research and Decision Making
bruce is trying to imagine the worst possible day on the job in order to help him figure out what he values at work. For bruce, this nightmare job scenario is: A. an intrinsic career value. B. an extrinsic career value. C. a lifestyle value. D. a self-discovery exercise.
May 13, 2016

Career Research and Decision Making
Thank you Ms.Sue
May 13, 2016

Career Research and Decision Making
A. an intrinsic career value. B. an extrinsic career value. C. a lifestyle value. D. a self-discovery exercise.
May 13, 2016

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