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...
thankyou phinds for confirming.
Thanks for completing those equations Michael Redei, i seen them done that way and I didn't understand it, its much more clear now.
The way this equality is written is correct.
So i reworked the problem, and I get this answer instead.
2* 7/2*x >= -1/4 *2
7x >= -1/2
7x/7 >= -1/2 / 7/1
x>= -1/14
which on a number plot should be about 0 to wherever (infinity)? including 0.
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 =...
Okay, so a counter question is this, why can't I turn around and see my image?
You're definitely free to turn around, but why won't that help you see your image?
another tutor asked me this. I was dumbfounded because I thought I was facing the mirror to begin with. So, help please.
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?
Okay, I realized that I missed something in the question where it said it was gaining speed.
So, as the electron is approaching B, its potential is rising, as the potential is rising so is the Electric potential energy, it is also rising. The electric Potential is higher at B, how can I prove...
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...