Friday
April 18, 2014

Posts by shay


Total # Posts: 354

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

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.

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 co...

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?

algebra 1
thanks anymore suggestions

algebra 1
graph the system of linear inequalities x+y<4 x+y>-2 please solve asap

science- I need help!
why was the telscope made

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

win a free note from me!
1971

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.

math
Thanks.

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)

math
Thank you.

math
989*789^2

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...

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?...

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

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 th...

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...

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: (Br...

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&...

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 angl...

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'...

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'...

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...

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. tr...

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'...

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.

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&...

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.

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 equa...

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...

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!!!!!!!!!

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). Tha...

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

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 deriv...

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

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 ...

scince
excuse me? what are you trying to say?

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 ...

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 cas...

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 ...

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...

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 wh...

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?

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?

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.

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...

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.

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. ...

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 + ...

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&...

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.

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 coo...

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