Homework Statement
5a = 5 - b
5a = 3 - b
Homework Equations
The Attempt at a Solution
I got the solution set to be 1/2, 5/2
i used substitution for substituting a into b of the second equation, just like they were x's and y's just used a's and b's there is no difference...
Homework Statement
find the slope-intercept form for the line satisfying the following conditions
x intercept 2, y intercept 2/3
Please let me know if I solved this correctly. Thankyou.
Homework Equations
The Attempt at a Solution
2, 0
0,2/3
(2/3 -0) / (0 - 2)
2/3 / -2/1
2/3 * -1/2...
Homework Statement
7/2x >= -1/4
then put it on a number plot.
Homework Equations
The Attempt at a Solution
7x/7 >= -2/4 = -1/2
-1/2 *7/1 = -7/2
x>= -7/2 and I'm not sure if I'm even correct for that answer, and I have to put it on a number plot.
Homework Statement
the perimeter of a rectangle is 24 ft. the length is 4 ft longer than the width find the dimensions
width x
length x+4
however, I should be doing it like this:
a first equation should start like: 2x+2y=?
and the second should start like x=y+?
so whats the...
Homework Statement
solve.
.2y^3 + .6y^3 - .5y^3
I believe the answer to be .3y^3
Homework Equations
The Attempt at a Solution
i got the answer to be .8y^3 - .5y^3
= .3y^3
I think this is correct, I'm not sure, please let me know if I finished this correctly.
Homework Statement
area of triangle with a base of: 2 & 3/4
and a height of 4/9
Homework Equations
1/2 * (b*h)
The Attempt at a Solution
i used:
1/2*(11/4 * 4/9) = 44/72 = 22/36 = 11/18
Homework Statement
use symbols to write and evaluate this problem
four squared divided by two to the fourth power
Homework Equations
The Attempt at a Solution
4^2 / 2^4
the answer I get is 1
Homework Statement
find the slope of this line it contains these points:
(-16, -1) , (-17, -7)
Homework Equations
y = mx + b
The Attempt at a Solution
i got y = 3/8x - .625
is that correct?
my work i use -7 +1 / -17 + 1
==-6/16
==6/16 = 3/8
then i used -7 =...
Homework Statement
Point charges +q and -q are placed at +50 cm and -50 cm on the x-axis, respectively. Is the electric field at the origin (halfway between the charges) zero or nonzero? If nonzero, which direction does it point?
Homework Equations
The Attempt at a Solution
If...
Homework Statement
Use Kirchhoff's junction rule to calculate the current supplied by the battery.
Homework Equations
attached a pic.
The Attempt at a Solution
Where do we start?
Homework Statement
Suppose a current of 1 A is flowing through a resistor. If this makes the resistor heat up, will the current through the resistor increase, decrease, or remain constant? Assume the voltage applied to the resistor is constant.
Homework Equations
The Attempt at a...
Homework Statement
An electron , influenced only by electric fields and forces, moves from A to B. When it reaches B, its speed is higher than it was at A. Is the electric potential higher at A or at B?
Homework Equations
The Attempt at a Solution
So as the electron gets closer...
Homework Statement
Point charges +q and -q are placed at +50 cm and -50 cm on the x-axis, respectively. Is the electric field at the origin (halfway between the charges) zero or nonzero? If nonzero, which direction does it point?
Homework Equations
The Attempt at a Solution
Well...
Homework Statement
A science museum has created a huge concave mirror with a focal length of 5 m, and mounted it so that it covers the entire wall at one end of a long hallway. If you stand on a center line painted down the middle of the hallway, you're on the mirror's principal axis. You...
Homework Statement
An alien civilization has crossed the galaxy to invade the Earth and enslave humanity, again. Their attacks have been successful so far because their assault troops are equipped with handheld weapons that project beams of charged particles (protons & electrons) at very...
Homework Statement
a large positive charge +Q fixed at some location in otherwise empty space, far from all other charges. A positive test charge of smaller magnitude +q is launched directly towards the fixed charge. Of course, as the test charge gets closer, the repulsive force exerted on...
Homework Statement
from the diagram i drew I want to calculate the current in the battery for the circuit, can someone help me with this. Want to use symbols too. R1 and R2 are in series, they are in parallel with R3, and R4 is in series with R1, R2, and R3. The diagram is attached...
Homework Statement
This picture shows two points charges, q1 = +5 nC, and q2 (unknown), fixed in place on the x axis. At the location marked P, the net electric field due to both charges is zero: EP = 0 N/C.
Based on the information shown in the picture, what can you conclude about the...
Homework Statement
The question is to provide a new composite heuristic h3 that is admissible and dominates h1 and h2. Then show the cost of each of the states through H according to h3.
Homework Equations
States:
A B C D E F G H
h1: 10,12,12,6,7,7,2,10
h2: 8, 9, 14,4,9,7,1,9...
Hi, I was just looking at this problem with sequences and I was having a question about factorials.
I understand that the factorials need to get smaller.
I was just wondering what is the (3)(2)(1) in the problem symbolizing?
Just that it will eventually reach the end? and what numbers...
Homework Statement
An object is placed in front of a converging lens in such a position that the lens (f = 15.0 cm) creates a real image located 21.0 cm from the lens. Then, with the object remaining in place, the lens is replaced with another converging lens (f = 16.0 cm). A new, real image...
Homework Statement
A spotlight on a boat is y = 2.5 m above the water, and the light strikes the water at a point that is x = 9.5 m horizontally displaced from the spotlight (see the drawing). The depth of the water is 4.0 m. Determine the distance d, which locates the point where the light...
Homework Statement
The drawing shows a rectangular block of glass (n = 1.52) surrounded by liquid carbon disulfide (n = 1.63). A ray of light is incident on the glass at point A with a = 36.0° angle of incidence. At what angle of refraction does the ray leave the glass at point B?
Please...
Homework Statement
A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.91 V and a current of 3.2 A are induced in the coil. The wire is the re-formed into a single-turn square coil, which is used in the...
Homework Statement
Magnetic resonance imaging (MRI) is a medical technique for producing "pictures" of the interior of the body. The patient is placed within a strong magnetic field. One safety concern is what would happen to the positively and negatively charged particles in the body fluids...
Homework Statement
A loop of a wire has the shape shown in the drawing. The top part of the wire is bent into a semicircle of radius r = 0.24 m.
The normal to the plane of the loop is parallel to a constant magnetic field ( = 0°) of magnitude 0.75 T. What is the change in the magnetic...
Homework Statement
Determine whether the curve x = 3t^2, y = e^2t+1 is concave up or concave down at the point (3, e^3)
thanks for any help with this one.
Homework Equations
The Attempt at a Solution
know i need to take the double derivative. Also that would be 6
and...
Homework Statement
Prove that the curve x = t cos(t), y = (pi/2 - t) sin(t) has a self-intersection at the point (0,0)
Homework Equations
The Attempt at a Solution
not sure where to start with this one. Please help.
Homework Statement
Evaluate the indefinite integral as an infinite series.
here is the problem: http://aycu28.webshots.com/image/38987/2005883203189533192_rs.jpg
Homework Equations
The Attempt at a Solution
not sure what test to use. My first guess would be to use the integral...
Homework Statement
Find the Taylor series for f(x) = sin x centered at a = pi / 2
Homework Equations
The Attempt at a Solution
Taylor series is a new series for me.
I believe the first step is to start taking the derivative of the Taylor series.
f(x) = sinx
f'(x) =...