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additional question, what about the magnitudue ?

The solution in the link is not exactly like question you asked, so that's why I pulled out a quote that answers your question correctly.

The answer is 3x - 5y = 7.

Here is how u solve this (i solved this 2 days ago so the memory is fresh):

Set up equation - 

\(x+y+z=12\)        (total socks)

\(x+3y+4z=24\)   (total money)

X is $1 socks, Y is $3 socks, and Z is $4 socks.

Use elimination to rid of X. - 

\(2y+3z=12\)

Now guess and check the solutions for (y,z).

After guessing and checking, we find out that the only solution is (3,2).

So we substitute it back into our original equation \(x+y+z=12\)

And solve

\(x+3+2=12\)

\(x=7\)

Answer should be \(\boxed{\text{(D) }7}\)

see answer on https://web2.0calc.com/questions/help-please_59401

The inverse of \(f(x) = \frac{2x-1}{x+5}\) may be written in the form \(f^{-1}(x)=\frac{ax+b}{cx+d}\), where a,b,c, and d are real numbers. Find a/c.

Is this right??

Post it in latex, I am only going to answer if it is in latex.

If you dunno how to do latex, then remove those extra latex wrappings

= 20/32 = 10/16 = 5 / 8

You could do it yourself easily, with the Web2.0 calculator on this site.....screenshot of your Q (look just above the calculator display)

haha perfect response!

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Yep.....you were on the right 'ramp' !

ohhh okay makes sense, thank you !!

thank you so much! I was sort of on the right track, thank you!

Draw two lines

there is one point of intersection

Draw 3 lines, there is 3 points of intersections

Draw 4 lines, there is 6 points of intersections

Draw 5 lines, there is 10 points of intersection

List:

Don't trust me, I might've gotten it wrong.

Downaward force = -55.8 N

Upward force = + 55.8 N                       Both have magnitude = 55.8

f= ma

55.8 = m (9.81)      will let you calculate the mass of the object, but it isn't asked.

Normal force is the force acting perpindicular to the plane (ramp) and would be   mg cos theta    where theta is the angle of the ramp.   at 0 degrees cos theta = 1      as the ramp angle is increased  cos theta gets smaller and the normal force decreases to 0 at theta = 90 degrees.

So, the magnitute equals 55.8 since its the force of the downward and upward forces? Is that what your saying?

Wouldnt i then need to solve for f=ma, How would I solve for f=ma using the 55.8 newtons?

If the block has any unbalanced forces acting on it, it will move. SInce it is hanging and not moving it has no net force, it will have a downward force of

f=ma     this force will exactly equal the upward spring force of kd      (k = spring constant    d = stretch of spring).

One is a downward force (say 'negative') the other is an upward force (say 'positive') but the MAGNITUDES are equal and they balance/cancel each other...so there is no net force acting on the block (net force = 0)

Addition:  55.8 newtons downward       and  55.8 newtons upwards are the forces acting on the block.  NET force = 0

I would also like to mention , the weight of the block on the scale is 55.8 newtons

f(x) = 1 / (x-3)    

the g(x) = f( f(x) ) =   1 /  [1/(x-3) -3 ] = 1/  (1 -3x+9)/(x-3) =  (x-3) / (10-3x)        x cannot equal 10/3  (denominator would be 0)

Thanks. Correct I only want to know when the water has reached 100° C, which under normal pressure would be its boiling point.

With lower pressure it would start boiling at less than 100° C but it could still be heated up to 100° C?

Now that you have drawn my attention to you, I can also see that you have NEVER said thankyou to anyone here.

Nor have you ever interacted with anyone in order to learn anything.

Your icon may be cute but you certainly are not. 

Do not put a string of questions like this.

We are not here to do all your homework.

22 marbles to start    43 to finish     she must add 21 marbles

red   red   red   white   white  (inany order)       she will add 5  5  5  3  3 = 21 marbles in 5 draws