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Using....rate x time = distance

Let x be the time at 75km/hr

Then, x + 2 is the time at 25km/hr

Then, because the distances are equal, we have

25(x + 2) = 75x   simplify

25x + 50  = 75x

50 = 50x  

x = 1     this is the time the car traveled

And its rate times its time gives the distance from A to B =  75km/hr (1 hr)  = 75 km

Note that the distance by bike is 25km/hr(1 + 2)hr = 25(3) = 75 km....just the same !!! 

Let Jo's amount be x

Let Lou's be 2x

And let Sherry's amount be x - 11

And together they all have $89....so....

x + 2x + x - 11  = 89    simplify

4x - 11  = 89     add 11 to both sides

4x = 100    divide by 4 on both sides

x = 25

And Lou has 2x = 2(25)  = $50

Thanks for that nice answer, saseflower....!!!

This is just all the possible sets that could be formed by choosing any 6 of 26 people.....this is given by

C(26, 6)  = 230,230 possible sets....!!!

.02 = x/(.5)2

Multiply .5 and 2 together

.02 = x/(1)

Multiply each side by 1

.02 = x

When you say a number is "of" another number, you are multiplying

 Ex:

What is 9% of 20?

You multiply .09 and 20 together to find the answer :)

Welcome aboard......!!!

When you post an answer, you'll see insert at the top

Click on insert, then special character

The division sign is the second to last character in the second row

→ ÷ ←

∞ x ∞ = ∞

∞ + ∞  = ∞

∞ - ∞ = ∞

As you may have noticed, infinity doesn't folllow the "normal" math rules. This because it's a concept rather than a number.

To see the last one above.....note that if I took away all the even integers {an infinite set in themselves} from the set of integers on the number line {another infinite set} , I would have the set of all odd integers left ...... {another infinite set}...!!!!!

(50 / 180) x pi = ( 5pi / 18 ) rads

this isnt a math question

just joinedand i am happy to be here

this is like my go to calculator because it does so much stuff
and i know some math and can explain  things

and i like easier posts and wished i could answer questions

now i can do all of these things and more


math man..... wow..........

V = length * width * height

example: 2 * 3 * 4 = 24. V=24 units³

SA = length * width

example 2 * 3 = 6. SA=6 units²

V=volume

SA=surface area

-dogeminer

ok thanks PS: just joined :)

A relation only.....it fails the vertical line test......so it's not a function.....every x value, except 0, is associated with two different y values....to be a function, no single x value can be associated with two different y's

-13 and 11

How about 12/72  ???   {which = 1/6 }

Subtract:  63.4 - 42.34  =  21.06 degrees.

Let's call this function z

So

z = (52 - 3x^2 - 4y^2)^(1/2)  .... so.....

z_x = (1/2)(52 - 3x^2 - 4y^2)^(-1/2) * ∂/∂x (52 - 3x^2 - 4y^2) =

(1/2) (52 - 3x^2 - 4y^2)^(-1/2) * (-6x) =

(-3x)(52 - 3x^2 - 4y^2)^(-1/2)

Remember....we're differetiating with respect to x, so any "y" terms are treated as constants when taking their derivatives.....

The Pythagorean Theorem can be used ONLY with right triangles.

Replace "what %" with "x" and "of" with "·".

Then you have:  627  =  x · 17130

Divide both sides by 17130:   0.00366  =  x  (approximately)

Change this into a percentage:  x  =  0.366%  (approximately)

If these represent vectors, then their resultant will be (3+-2, 1+4, -6+3)  =  (1, 5, -3)

Thanks geno, I was just a little confuzzled when it said atan and not tan-1, thanks! :)

Scientific notation has the decimal point after the first non-zero digit; for this problem, the 4.

Because the decimal point gets moved to the right, the exponent will be negative.

Since the decimal point must be moved four places, the exponent will be negative 4.

Answer:  4.26 x 10^-4.

Thank you so much alan!!

you the bae B-)

-dogeminer