Thursday
December 18, 2014

Posts by MatT


Total # Posts: 1,928

Math
Part (a): Find the sum a+(a+1)+(a+2)+.....+(a+n-1) in terms of a and n Part (b): Find all pairs of positive integers (a,n) such that n>= 2 and a+a+1)+(a+2)+....+(a+n-1)=100.
December 15, 2014

Math
Let a1,a2,......a10 be an arithmetic sequence. If a1+a3+a5+a7+a9=17 and a2+a4+a6+a8+a10=15 then find a1.
December 15, 2014

Math
Penn writes a 2013-term arithmetic sequence of positive integers, and Teller writes a different 2013-term arithmetic sequence of integers. Teller's first term is the negative of Penn's first term. Each then finds the sum of terms in his sequence. If their sums are ...
December 15, 2014

Math
Penn writes a 2013-term arithmetic sequence of positive integers, and Teller writes a different 2013-term arithmetic sequence of integers. Teller's first term is the negative of Penn's first term. Each then finds the sum of terms in his sequence. If their sums are ...
December 14, 2014

Algebra
Suppose that |a-b|+|b-c|+|c-d|+.......+|m-n|+|n-o|+............|x-y|+|y-z|+|z-a|=20. What is the maximum possible value of |a-n|?
December 13, 2014

Algebra
Suppose that |a-b|+|b-c|+|c-a|=20. What is the maximum possible value of |a-b|?
December 13, 2014

Algebra: Reiny Correction
It is the fiftieth term not the fifteenth so would it be t50=a+49d
December 13, 2014

Algebra
The second and ninth terms of an arithmetic sequence are 2 and 30 respectively. What is the fiftieth term.
December 13, 2014

Algebra
Evaluate [3.2]. It is a floor and ceiling function. Thanks.
December 12, 2014

Abnormal Psychology
I need help diagnosis this case for my abnormal psychology review. Mr. B is a 20-year-old male college student who was recently arrested for possession of marijuana, which was detected when he was stopped for un¬safe driving. He was charged with driving while intoxicated ...
December 9, 2014

Chem-Diprotic Acid
Ascorbic Acid is an organic diprotic acid, H2A, that is found in many natural materials. KA1=7.94x10^-5 and KA2=1.62x10^-12. If you start with a 0.75 M solution of H2A, what is the concentration of ALL species in the solition at ph=3.8? I have no idea how to even start this ...
December 7, 2014

Math
The quantity sqrt(45)- 2sqrt(5) +sqrt(360/2) can be expressed as sqrt(N), where N is an integer. Find N. * the whole fraction 360/2 is squarerooted.
December 5, 2014

Math
Solve for the positive value of x such that 3sqrt(x^2-4x+4)=16. The 3 is the small number next to the sqrt sign.
December 4, 2014

accounts
Diane Gobin is the founder and manager of Gobin's World. Diane has approached the local bank for a loan to expand her business. As part of the loan application, Diane was asked to prepare Financial Statements for the business. She prepared the following balance sheet and ...
December 4, 2014

math
A book store bought 160 copies of a book for $4,000. How much money will they loose if they give away 2 books. show in ratio table form. Every book costs $25 so the store would loose $50 but how do you put that in a ratio table?
December 3, 2014

Physics
A 10kg mass is located at the (1.00m)i + (2.00m)j + (2.00m)k. A 5kg mass is located at (-1.00m)i + (1.00m)j + (1.00m)k. (A) Determine the moment of inertia of this system about an axis through the origin parallel to the x-axis. (B) Determine the moment of inertia of this ...
November 29, 2014

Brief Calculus
Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. (Round your answer to four significant digits.) Enclosed by y = e^x, y = 2x + 1, x = −2...
November 25, 2014

Brief Calculus
Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. Between y = −x and y = −x^3 for x in [−1, 1]
November 24, 2014

Chemistry: Sigma & Pi bonds
How many sigma bonds and pi bonds are there in each of the following: CH2Cl2 C2H3Cl C5H6 C6N4
November 19, 2014

english
need help on writing science fiction short story?
November 18, 2014

math
I don't think my first response went thru...so reposting! Thank You Ms. Sue, for the answer to cubic inches (11/16/14). It also made me realize that I skipped the step of multiplying the dimensions by each other.
November 18, 2014

algebra 1
cube root of (-64x^8y^5) Is it -8x^2y times the cube of y^2?
November 18, 2014

algebra 1
cube root of (-64x^8y^5)
November 18, 2014

GEOMETRY
the coordinates of point T are given. The midpoint of ST is (5,-8). Find the coordinates of point S. 18) T(10,18)
November 18, 2014

math
Thank You Ms. Sue, for the answer to cubic inches. It also made me realize that I skipped the step of multiplying the dimensions by each other.
November 16, 2014

math
how many cubic inches in 7'8"L, 12'2"W, 10'1" tall? please show how you get to the answer. I added up the feet (7+12+10=29 ft) and multiplied by 12 inches (29x12=348 in), then added on the remaining inches (8+2+1=11, 348+11) to come up with an answer...
November 16, 2014

Business Law
Two brothers, Sam and Jim, were fighting over the division of their ancestral property. After ten years of legal battle, a frustrated Sam contacted a powerful politician who subjected Jim to extreme duress in order to make him sign a contract of assent in favor of Sam. When ...
November 15, 2014

Physics
A 4 kg mass and a 9 kg mass are being held at rest against a compressed spring on a frictionless surface. When the masses are released, the 4 kg mass moves to the east with a speed of 2m/s. What is the velocity of the 9 kg after the are released?
November 12, 2014

question
Mini Makers, a small manufacturer of action figures, is formulating a budget for next year's promotional activities. The company decides to budget $50,000 for promotional expenses (an amount equal to its nearest competitor's allotment.) Mini Makers is using the ____ ...
November 10, 2014

Chemistry
Thank You!
November 10, 2014

Chemistry
If a balloon containing 1000 L of gas at 50 degrees Celsius and 101.3 kPa rises to an altitude where the pressure is 27.5 kPa and the temperature is 10 degrees Celsius, its volume there is?
November 10, 2014

Calculus
Hello. I have a few questions from my study guide, that I need to know to study for my test. 1) x^(2/3)*((5/2)-(x) a) determine the ordered pairs of the local extrema of the function. Use the second derivative test. B) determine the ordered pairs of all inflection points of ...
November 10, 2014

Physics
A 4 kg mass and a 9 kg mass are being held at rest against a compressed spring on a frictionless surface. When the masses are released, the 4 kg mass moves to the east with a speed of 2m/s. What is the velocity of the 9 kg after the are released?
November 9, 2014

Goverment
If you could get the government to implement one policy what would it be? Can't be marijuana legalization.
November 9, 2014

Physics
A target lies flat on the ground 4 m from the side of a building that is 10 m tall, as shown below. The acceleration of gravity is 10 m/s2 . Air resistance is negligible. A student rolls a 4 kg ball off the horizontal roof of the building in the direction of the target. The ...
November 7, 2014

Math
Nathan is designing a box to keep his pet newt in. To make the box, he’s going to start with a solid rectangle and cut squares with sides x cm in length from each corner, as shown in the picture below. The dimensions of the of the solid rectangle are 51 cm by 45 cm. The ...
October 30, 2014

Business
1.The owners of Brownfield Machinery, brothers George and Robb, now in their late 50s, have decided to sell the business. No one else in the family is interested in taking over the business. Brownfield machinery has 11 employees and sales of $2.5 million in 2012.George and ...
October 27, 2014

Business
1. After operating for 10 years, Zipcar, earlier this year (2013), was bought for $500 million by Avis, a leader in the car rental industry. With the acquisition of Zipcar, Avis will now surpass its direct competitors, Hertz and Enterprise.The deal is expected to be finalized ...
October 27, 2014

Chemistry
what mass of precipitate will form if 1.5L of concentrated pb(clo3)2 is mixed with .55L of.190 M NaI
October 26, 2014

Math
Thanks for the help.
October 25, 2014

Math
Simplfy the following expression - 3x + 5x + y+y+y I think the answer is 8x + 3y Would I be right? Thank You
October 25, 2014

statistics
A professor is interested in determining whether assigning mandatory homework affects students’ grades. He is currently teaching two sections of the same class; in one class, he assigns mandatory homework problems, while in the second class, he just recommends homework ...
October 24, 2014

statistics
A health psychologist, who is interested in childhood obesity, thinks that there may be a relationship between daily television viewing and eating habits. Data is collected from 500 children; for each child, information is collected on the number of hours of daily television ...
October 24, 2014

statistics
Researchers investigated the effects of encoding conditions on subsequent memory for a list of words. Participants were assigned to one of three encoding conditions: 1) saw list of nouns they were asked to remember (word alone condition), 2) list of words was accompanied by a ...
October 24, 2014

physics
A 1075 kg van, stopped at a traffic light, is hit directly in the rear by a 705 kg car traveling with a velocity of +2.06 m/s. Assume that the transmission of the van is in neutral, the brakes are not being applied, and the collision is elastic. What is the final velocity of ...
October 23, 2014

Math help
Please answer this 1 question!! 1.Which could be the name of a point? A. EF B. k C. Q D. MN
October 21, 2014

Chemistry
Consider the following reaction. 2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) ΔH = -118 kJ Calculate the heat when 114.8 mL of 0.500 M HCl is mixed with 300.0 mL of 0.400 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0°C and that the ...
October 19, 2014

Physics
A bullet is fired from a rifle that is held 2.5 m above the ground in a horizontal position. The initial speed of the bullet is 1450 m/s. Find: (a) the time it takes for the bullet to strike the ground and (b) the horizontal distance traveled by the bullet.
October 17, 2014

Math 116
Well, you could say: since every square is a rectangle 'because it is a quadrilateral with all four angles right angles,' therefore the area didn't change.
October 14, 2014

Math
hint exterior angle is 360, minus 120 subtract total degrees of triangle
October 14, 2014

c programming
string[] dDate = dob.Split('/'); string dDay = dDate[0]; string dMonth = dDate[1]; string dYear = dDate[2]; if (Convert.ToInt32(dDay) > 01) { if (Convert.ToInt32(dMonth) == 01 || Convert.ToInt32(dMonth) == 03 || Convert.ToInt32(dMonth) == 05 || Convert.ToInt32(...
October 14, 2014

Chem
If not all the alum dissolves in the water before adding the Ba(NO3)2 solution, what effect will this have on the sulfate percent error determination?
October 12, 2014

Chemistry
How much heat would you need to melt 20.0 L of ice that had frozen on a fruit tree.
October 11, 2014

math
2 times
October 11, 2014

math physics
you forgot gravity
October 9, 2014

@someone who can show me how to do this
*infinite
October 9, 2014

@someone who can show me how to do this
infinate if x=1, then 6(1)+y=-3 6+y=-3 move the six y=-3+(-6) y=-9 or if x=-2, then 6(-2)+y=-3 -12+y=-3 subtract the twelve and add to the other side y=-3+(--12) two neg = positive thus y=-3 + 12 y=9
October 9, 2014

physics
5ms+16=21ms initial velocity (io) the delta v(t)=(ending velocity-io)/total deceleration time = (t)f/s^2 Thus, change in velocity = a t 0-21 = (t)f/s^2 second to top = t and therefore: d = Vi t + (1/2) a t^2
October 9, 2014

chemistry
First, find out how many moles of hydrogen there are Then, use Avagadro's Constant to find out how many atoms there are.
October 9, 2014

economics
ps is the difference between the amount that producers actually receive and the minimum amount that they would have to receive in order to supply the given level of output. On a graph, ps can be shown as the area above the supply curve and below the prevailing market price.
October 9, 2014

chemistry
the actual mass (g) = Number of moles x Molar mass, or m = n x M Number of moles of solute = Concentration (mol. L) x Volume of solution (liters) -1 or n = C x V
October 9, 2014

economics
that should have been answered in your other question
October 9, 2014

Chem 30 Thermodynamics
your temperature increase -or decrease- is given by the specific heat (S) of the object. (s)pecific heat = (new temp)/mass*change in temp. or if youre crazy, calculate the actual change in temp = heat added/(mass x specific heat) and compare it to actual (known) heat capacity ...
October 9, 2014

math
Trick question...you have 9 blocks!
October 9, 2014

physics
Use the third equation of motion velocity to displacement Your initial velocity is 15m/s Your final velocity is 0m/s displacement is 0m substitute the values and solve time
October 9, 2014

physics
If you don't have laminar flow, then you need to figure Quadratic Drag, drag force is proportional to the square of velocity and to the cross-sectional area of the object. For which you'll need to id the correct Reynolds Number
October 9, 2014

physics
given laminar flow, the drag force is proportional to the radius of the sphere and to its velocity. Double the radius, double the drag force. Double the velocity, double the drag force. This is known as Stokes Drag
October 9, 2014

science
yup
October 9, 2014

physics
Work=mgh
October 9, 2014

pre calculus
cscB - sinB = 1/sinB - sinB = (1 - sinB*sinB)/sinB = (1 - sin^2B)/sinB = cos^2B/sinB = cosB*(cosB/sinB) = cosB(cotB)
October 9, 2014

math
6500-2500=4000 4000/2=2000 2500+2000=4500 or 6500-2000=4500
October 9, 2014

Abnormal Psychology
youth/adults
October 9, 2014

math
a total of 4 km in one hr. if she did at the same rate that would be 4 kph Time=distance/walk speed + distance/run speed (ie. walk * 2) T(x)=D/X + D/X*2
October 9, 2014

computer science programming
def sum(number): # we are defining a function a = 0 #defines a = 0 becuase we start at 0 in python sum=0 # defines sum at zero because we start at 0 while a<checked_input: #check everytime if the a is redefined if it still is true sum = sum + (a+1)#combination of this line...
October 9, 2014

computer science programming
what language?
October 9, 2014

3rd grade math
35/5=7
October 9, 2014

Econ
Since quasilnear preferences is a special case of a utility function Then... u(x,y) = v(x) + y Taking the derivative and setting to zero, a condition for maximizing utility is v’(x) - p = 0 or p(x) = v’(x) p(x) vs x as inv demand function
October 9, 2014

Physics
Horizontal direction : IF angle is measured from y axis (vertical line) -> a(horizontal) = Fsin(32)/m IF angle is measured from horizontal -> a(horizontal) = Fcos(32)/m Vertical direction: [ here positive a means acceleration down, negative a means up] IF angle is ...
October 9, 2014

physics
The Temperature Coefficient of Copper (near room temperature) is +0.393 % per o C. This means if the temperature increases 1o C the resistance will increase 0.393%. does that help?
October 9, 2014

Physics
9.8 ballM/s^2
October 8, 2014

Math: ALGEBRA
How to solve this??? Solve for x. a+b= a+xy Solve for w. 2w+2h+L=p Solve for r. r(s+t)=u
October 8, 2014

Math: ALGEBRA
Omg thanks herp_derp
October 8, 2014

Math: ALGEBRA
How to solve this??? -1-8(x+12)> -44-8x -4(-12v-9)+6(-6+5v)> -4v+12v
October 8, 2014

math plz help
a
October 8, 2014

CHEM 111
There are rules governing when a double displacement reaction actually takes place. Mixing these two solutions results only in a solution containing a mixture of Na+, NH4+ PO4 3- and Cl- ions. There is no reaction product. IE. the net ionic equation. This is not possible ...
October 8, 2014

CHEM 111
no reaction product
October 8, 2014

finance
interest rates dropping at 6% a year for 10 years?
October 8, 2014

math
divide by .66
October 8, 2014

algebra
50/3.6=13.8 lb
October 8, 2014

Science 8
2nd llaw: For example, you may realize, when looking for a car that the miles per gallon of a sports utility vehicle is always lower than that of a standard car. The reason behind this is explained in Newton’s Second Law. The mass of a sports utility vehicle is much ...
October 8, 2014

Finance
sorry about that, if the contract period is 12 months or less in duration, or if the contract produces a single outcome it's based on annual funding...otherwise incremental funding so A
October 8, 2014

Finance
appropriations are subject to the Annual Funding Policy...so B
October 8, 2014

HEALTH
yea
October 8, 2014

Science
metals/ceramics
October 8, 2014

physics
4π²R³ = T²GM and V²R = GM, where R = radius of orbit in metres, T = orbital period in seconds, V = orbital speed in m/s, G = gravitational constant ≈ 6.673×10−11 Nm²/kg², M = mass of Earth ≈ 5.98×1024 kg
October 7, 2014

science
nebular aggregation
October 7, 2014

science 1 question
last one is not significant, as 0 add's nothing to the data
October 7, 2014

science 1 question
343.2
October 7, 2014

SS
island/continent, desert/ocean, mountain/canyon
October 7, 2014

Physics
no takers?
October 7, 2014

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