Thursday

May 7, 2015

May 7, 2015

Total # Posts: 385

**8th grade**

how do you work this out? 5x-6x and 6x+2x-3
*October 20, 2009*

**Physics**

A basketball player tries to make a half-court jump shot, releasing the ball at the height of the basket. Assuming that the ball is launched at 48.0°, 13.0 m from the basket, what speed must the player give the ball?
*October 18, 2009*

**Algebra 1B**

none
*September 30, 2009*

**psychology**

1. We are creators of our personal and social worlds. We benefit from experiences of freedom and from being able to view ourselves as agents rather than pawns of external forces. The belief in a dynamic self capable of choice, change, and control influences the goals we choose...
*September 25, 2009*

**Math 213 Elementary Math**

20. Think of a number. Add 7. Double the result. Subtract 8. Double the result. Add 12. Divide by 4. Subtract 6. Your answer will be the original number. Explain how this trick works.
*August 7, 2009*

**Math 213 Elementary Math**

2. Let U = {x x is a female} A = {x x is a mathematician} B = {x x owns a pickup} C = {x x owns a dog}
*August 5, 2009*

**Math 213 Elementary Math**

1. List all the subsets of {2, o, t}.
*August 5, 2009*

**Math 213 Elementary Math**

Use the definition of less than to show each of the following: a. 2 < 4 b. 3 < 100 c. 0 < 3
*August 5, 2009*

**Math 213 Elementary Math**

Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Ed’s friends, Stacey, eats chocolate exclusively. How many ...
*August 5, 2009*

**Math 213 Elementary Math**

Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Ed’s friends, Stacey, eats chocolate exclusively. How many ...
*August 5, 2009*

**Math 213 Elementary Math**

Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Ed’s friends, Stacey, eats chocolate exclusively. How many ...
*August 4, 2009*

**Math 213 Elementary Math**

Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Ed’s friends, Stacey, eats chocolate exclusively. How many ...
*August 4, 2009*

**Math 213 Elementary Math**

List all the subsets of {2, o, t}.
*August 4, 2009*

**accounting**

Malissa is an accountant. Sometimes printouts of financial statements have errors and are not usable. Malissa doesn't like to waste anything, so she takes the unusable financial statements to her son's day care center to use for drawing paper. Explain why you think ...
*June 24, 2009*

**math**

four diesel ships left a port at noon;january2,1953.the first ship returns to this port every 4 weeks, the second every 8, the third every 12,and the fourth every 16.when did all four ships meet again in the port?
*December 4, 2008*

**psy**

I agree with Anon.
*October 30, 2008*

**social studies**

king george issued the proclamation of 1763 this proclamation was issued to?
*October 30, 2008*

**math**

Yes you are right. It say cetirizine HCI/ antihistamine 10 mg tablets. But could I still use this as one of my answers?
*October 20, 2008*

**math**

For Zytrec the Quantity measured is the mass ("weight") and the unit will be milligrams. I am going by the information I have. Is this the correct understanding?
*October 20, 2008*

**math**

So for the pillow I can put 25X30 mm? For the lenght, width I can use millimeter, centimeter, meter or kilometers?
*October 20, 2008*

**math**

So a measurement for a room in my house for example: A bath room 8X10 feet or A pillow 10X12 inches? Would this be correct?
*October 20, 2008*

**math**

I need help. I have information on the metric system. I have to list things at home and grocery store that display metric units. I don't know if I quite understand. I am trying to understand the reason behind my answer. The metric units and measurements are lengh, mas(...
*October 20, 2008*

**science**

Is it possible to titrate folic acid?
*October 9, 2008*

**Science**

How does elevation affect speed of an object
*September 18, 2008*

**Geometry**

i just don;t get the question. I don't understand what it's asking for.
*August 25, 2008*

**Geometry**

Ehehe... i know that. I'm not looking for the answer itself, just the way that i might go about finding it. I would actually much rather find the actual answer myself.
*August 25, 2008*

**Geometry**

Fibonacci sequnce has this pattern: 1,1,2,3,5,8,13,21,34,55,...... each number is achieved by adding the previous number to the current number (1+1=2, 2+1=3, 3+2=5,....) List the first eight terms of the sequence formed by finding the differences of successive terms.
*August 25, 2008*

**Geometry (sorta)**

seven people meet and shake hands with eachother- how many handshakes occur? (second question) using inductive reasoning, write a formula for the number of handshakes if the number of people is n
*August 25, 2008*

**math**

Fibonacci sequnce has this pattern: 1,1,2,3,5,8,13,21,34,55,...... each number is achieved by adding the previous number to the current number (1+1=2, 2+1=3, 3+2=5,....) List the first eight terms of the sequence formed by finding the differences of successive terms.
*August 25, 2008*

**Math**

seven people meet and shake hands with eachother- how many handshakes occur? (second question) using inductive reasoning, write a formula for the number of handshakes if the number of people is n
*August 25, 2008*

**physics**

Can a convex lens be used to magnify an image, "shrink" an image, or both? Explain.
*April 16, 2008*

**maths**

Is this right, and where do i go from here??? solve p-1/2-p-2/3=1 (3p-3)-(2p-4)/6=1
*April 16, 2008*

**Physics**

I guess that makes sense. I don't really understand physics and I have been struggling through this class. Can you please just help me out with the question.
*April 15, 2008*

**Physics**

The voltage across each, power dissipated in each, and current through each are the same for both resistors. When the resistors are different I believe the voltage across each, and the power dissipated in each are different and the current through each are the same. Is this ...
*April 15, 2008*

**Physics**

When a pair of identical resistors is connected in series which of the following is the same for both resistors: voltage across each, power dissipated in each, current through each? What about if the resistors are different from each other?
*April 15, 2008*

**algebra 1**

thanks anymore suggestions
*January 30, 2008*

**algebra 1**

graph the system of linear inequalities x+y<4 x+y>-2 please solve asap
*January 30, 2008*

**science- I need help!**

why was the telscope made
*January 23, 2008*

**science**

I am doing a science project on density and buoyancy. What would be a good hypothesis for this topic?
*January 19, 2008*

**win a free note from me!**

1971
*January 17, 2008*

**Math**

(4*10^3)*(4.5*10*-3) Operations with scientific notation. Perform the indicated operation. Each final answer must be written in scientific notation.
*January 17, 2008*

**math**

Thanks.
*January 17, 2008*

**math**

Operations with scientific notation Perform the indicated operation. Each final answer must be written in scientific notation. 1. (2.34*10^5)*(-4*10^-8) 2. (4*10^3)*(4.5*10^-3) 3. (5*10^5)*(4.3*10^2)
*January 17, 2008*

**math**

Thank you.
*January 17, 2008*

**math**

989*789^2
*January 17, 2008*

**Algebra**

The size of the beaver population at a national park increases at the rate of 5.1% per year. If the size of the current population is 151, find how many beavers there should be in 4 years. Use the function f(x)=151e^0.051t and round to the nearest whole number. (This is what I...
*October 25, 2007*

**Physics**

Please check my answers: The voltage across a 10-ohm resistor carrying 3 amps must be? I got 30 volts-v=?, I=3 amps, R= 16 ohm. v= 30 amps * 10 ohm=30 volts A 4-ohm resistor is connected in parallel with a 6 ohm resistor. What is the total resistance of this pair of resistors...
*October 24, 2007*

**criminology**

what crime control strageties are effective according to rational choice theory This site may help you. http://www.umsl.edu/~rkeel/200/ratchoc.html
*June 11, 2007*

**Graphs**

The vertices of a triangle are A(13,13), B(9,3), and C(-1,1). Determine the equation of the median AM, where M is the midpoint of BC. Midpoint M of BC = ((9-1)/2,(3+1)/2) =(4,2) slope AM = (13-2)/(13-4) = 11/9 So the equation of the median is 11x - 9y + c = 0, (knowing that ...
*April 4, 2007*

**Math**

Three circular pipes with 30cm diamters are strapped together. Find the length of the strap to the nearest centimeter. I got the circumference of the circle which is 94.25cm but that's where i got stuck. Can you please help? you are wrong sorry to tell ya. the circumfrence...
*April 4, 2007*

**Math**

Each exterior angle of a regular polygon is 15 degrees. How many sides does the polygon have? and What is the sum of the interior angles? Since this is not my area of expertise, I searched Google under the key words "polygon angles" to get these possible sources: (...
*April 4, 2007*

**please help!!!!! someone**

Each exterior angle of a regular polygon is 15 degrees. 1.Determine the number of sides of the polygon. 2.What is the sum of the interior angles? if the exterior angle is 15, then the interor angle is 165. 165n=(n-2)180 solve for n. I need help to study for my "The Giver&...
*February 25, 2007*

**math.**

Each exterior angle of a regular polygon is 15 degrees. 1.Determine the number of sides of the polygon. 2.What is the sum of the interior angles? please help!!!!!!!! i'd love to help but i can't remember how to do those problems. sorry. The sum of all the exterior ...
*February 25, 2007*

**Marie**

Maurice drove 400 km from Edmonton to Battleford in 1 hour less time than it took Martin to drive the same route from Battleford to Edmonton. If Maurice drove 20 km/h faster than Martin, at what speed did each of them drive? Show a complete algebraic solution. Let Maurice'...
*February 25, 2007*

**algebra**

Maurice drove 400 km from Edmonton to Battleford in 1 hour less time than it took Martin to drive the same route from Battleford to Edmonton. If Maurice drove 20 km/h faster than Martin, at what speed did each of them drive? Show a complete algebraic solution. Let Maurice'...
*February 25, 2007*

**conjectures**

I'm finishing my math 20 Pure. This is my last 20 course then i have 30's. Also I have to work a full time job so that I can live on my own with my boy. So it is tough but I'm doing alright. What about you? wow, okay i have no idea what all that is but good luck. i...
*February 25, 2007*

**conjectures**

Evaluate the following sums: 1 1+8 1+8+27 1+8+27+64 Add two more line to the list, and make a conjecture about the sums you obtained. this is a pattern. if you look closely than you'll see each number is a product of another number cubed. (1^3)+(2^3)+(3^3)... and so on. ...
*February 25, 2007*

**please help!!!!**

Maurice drove 400 km from Edmonton to Battleford in 1 hour less time than it took Martin to drive the same route from Battleford to Edmonton. If Maurice drove 20 km/h faster than Martin, at what speed did each of them drive? Show a complete algebraic solution. Let Maurice'...
*February 25, 2007*

**algebra**

Maurice drove 400 km from Edmonton to Battleford in 1 hour less time than it took Martin to drive the same route from Battleford to Edmonton. If Maurice drove 20 km/h faster than Martin, at what speed did each of them drive? Show a complete algebraic solution.
*February 19, 2007*

**algebra**

Maurice drove 400 km from Edmonton to Battleford in 1 hour less time than it took Martin to drive the same route from Battleford to Edmonton. If Maurice drove 20 km/h faster than Martin, at what speed did each of them drive? Show a complete algebraic solution. Let V = Maurice...
*February 13, 2007*

**algebra, please help.**

Maurice drove 400 km from Edmonton to Battleford in 1 hour less time than it took Martin to drive the same route from Battleford to Edmonton. If Maurice drove 20 km/h faster than Martin, at what speed did each of them drive? Show a complete algebraic solution.
*February 12, 2007*

**algebra**

Maurice drove 400 km from Edmonton to Battleford in 1 hour less time than it took Martin to drive the same route from Battleford to Edmonton. If Maurice drove 20 km/h faster than Martin, at what speed did each of them drive? Show a complete algebraic solution. This is the ...
*February 12, 2007*

**algebra**

A 0.5 kg ball is thrown vertically upward at a speed of 25 m/s. Its velocity, v(t) (in m/s), at time, t (in seconds), is given by v(t)= 25-9.8t Its kinetic energy, K(v) (in Joules), is given by K(v)=0.5v^2. Express the ball's kinetic energy as a function of time, K(t). K(t...
*February 11, 2007*

**general math**

here's an easy one for starters... what means greater or equal to on a number line, a closed dot or an open dot? open dot. it is a closed dot, 1000% sure!!!!!!!!!
*February 11, 2007*

**Algebra everyone!!!**

A 0.5 kg ball is thrown vertically upward at a speed of 25 m/s. Its velocity, v(t) (in m/s), at time, t (in seconds), is given by v(t)= 25-9.8t Its kinetic energy, K(v) (in Joules), is given by K(v)=0.5v^2. Express the ball's kinetic energy as a function of time, K(t). ...
*February 11, 2007*

**algebra**

determine the x-intercepts for the function y=2x^2+5x-3 Factor this: 0=2x^2+5x-3 That gives the roots. i agree with bobpursley's statement as long as the numbers 2 5 and 3 are not squared or 2! 5! 3! then it would change the problem
*January 19, 2007*

**algebra**

determine the vertex for the function y=2x^2+5x-3 for y = ax^2 + bx + c, the x value of the vertex is -b/(2a) sub that x into your equation to find the y. Another way is to complete the square. so for yours, x = -5/4 etc. a third way, if you know Calculus, is to find the ...
*January 18, 2007*

**x-intercepts**

0=2x^2+5x-3 determine the x-intercepts This is a quadratic equation. Use the quadratic equation, or... Factor it. (2x -xxx)(x +xxxx)=0
*January 18, 2007*

**algebra**

y=2x^2+5x-3 a)determine the x-intercepts b)determine the vertex c)determine the axis of symmetry d)determine the maximum or minimum value, stating whether it is a maximum or a minimum e)determine the range can i get the eqations so i can try them myself? For a and b, there is ...
*January 18, 2007*

**scince**

excuse me? what are you trying to say?
*January 18, 2007*

**algebra**

A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=-5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. you have to equate h to 6: h = 6 ----> 5t^2+10t+2 = 6 ---> 5 t^2...
*January 18, 2007*

**algebra**

Determine the value(s) of k for which x^2+(k-2)x-2k=0 has equal and real roots. a x^2 + bx + c = 0 has two different roots if the discriminant D defined as: D = b^2 - 4 a c does not equal zero. If D = 0 then there is one root. That root is then real if b/a is real. In this ...
*January 18, 2007*

**math**

A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=-5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. set h=6 rearrange the quadratic equation to get 5t^2 - 10t + 4=0 Solve ...
*January 18, 2007*

**can someone please help me?**

simplify the following expressions involving complex numbers. (3+2i)-(-7-i) 10 + 3i how did you do that? can you show me this one and explain how this time? (3+2i)(-7-i) or even (3-2i)^2 you would do 3+2i=5i, then -7-i=7i then 5i+7i=12i (3+2i)-(-7-i) = (3+2i) + (7 + i) = 3 + 7...
*January 18, 2007*

**math**

A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=-5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. I don't get how to calculate it. Please help. whats the question ...
*January 18, 2007*

**math**

simplify the following expressions involving complex numbers. (3+2i)-(-7-i) is i like x? and how would this work i know that you do this: (3+2i)(7+i) to get rid of the sign between the expressions. but then what?
*January 18, 2007*

**math**

simplify the following expressions involving complex numbers. (3+2i)-(-7-i) is i like x? and how would this work i know that you do this: (3+2i)(7+i) to get rid of the sign between the expressions. but then what?
*January 18, 2007*

**math**

A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=-5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. I don't get how to calculate it. Please help.
*January 18, 2007*

**math**

The rectangle given has a perimeter of 14 units. Find the value(s) of x by factoring a quadriatic equation. one side= 12/(x+1) other side= 6/(4-x) Remember that the perimeter of a rectangle is: P = 2L + 2W Note: P = perimeter, L = length, and W = width. Therefore: 14 = 2[12/(x...
*January 17, 2007*

**MATH**

find the x-intercepts of y=3x^2-6x by factoring y = 3x^2 - 6x Factor out 3x: y = 3x(x - 2) Set each factor equal to 0: 3x = 0; x = 0 x - 2 = 0; x = 2 Those are your x-intercepts. I hope this will help.
*January 17, 2007*

**MATH**

solve 1-(2/x)=2/(x+2) Express your answer in simplest radical form. What is radical form ne how? 1-(2/x)=2/(x+2) Multiply both sides by x(x+2): x(x+2) - 2(x+2) = 2x Note that we cannot allow x to be 0 or minus two because for these values the original equation is not defined. ...
*January 17, 2007*

**Math**

The ractangle given has a perimeter of 14 units. Find the value(s) of x by factoring a quadriatic equation. x= 12/(x+1) y= 6/ (4-x) If anyone can help me that would be awesome, thanks a bunch. I can only give you an example : for example x2 - x -6 = 0 solution x2 - 6 = 0 (x + ...
*January 17, 2007*

**algerbra**

mrs. johnson is 3 times as old as her son. ten years agoe she was 5 times as old as her son was then. what is the two equations for this problem? let x = son's age and y = Mrs. Johnson's age. ============================ y=3x is one equation. 10 years ago Mrs. Johnson...
*December 4, 2006*

**Science**

Why must chromosomes be duplicated before mitosis? DNA is the instruction of making proteins.To have a new cell that can work, it must has a replication of DNA.
*September 13, 2006*

**Calculus**

Hello. I would appreciate it if someone could check my answers. I'm sorry it is so long. 1.) Let R denote the region between the curves y=x^-1 and y=x^-2 over the interval 1<= x <= 10. a. Set up an integral for the area of R. My answer: 1.403 b. Find x-bar, the x ...
*September 3, 2005*