All Answers 358105 Answers

(- 1/2)x = 6      multiply both sides by -2

x = -12

What is 10/2 then /2 the /2 then /2 then /100

10 / 2 = 5

5 / 2 = 2.5

2.5 / 2 = 1.25

1.25 / 2 = .625

.625 / 100 = .00625

10/2=0/2=0/2=0

Use the sine inverse to find this.....

sin^-1(.643) = about 40.02 degrees

This could also be a 2nd quad angle = [ 180 - 40.02] = 139.98 degrees

n=0 and n=4

5n^2=20n    subtract 20n from both sides

5n^2 - 20n =  0       factor

5n(n - 4) - 0      set both factors to 0

5n= 0       divide both sides by 5

n = 0

And  n - 4 = 0     add 4 to both sides

n = 4

So..... n= 0 and n = 4

This is too easy.

v=2

Go to the "Formulary" tab on the onsite calculator.....you will see an applet that will let you calculate this, easily.

This is a really good one for high school students to look at.  (Maybe years 9 to 11)

Chris has given you a nice solution. Thanks Chris.

Thanks for those points,  Melody....!!!!

"c" is easy.... it's = 7

The vertex is at (h, k) = (-1, 8)   and the point    (2. -1) is on the graph

So we have

y = a(x - h)^2 + k

-1 =a(2- (-1))^2 + 8

-1 = a(3)^2 + 8      subtract 8 from both sides

-9 = a(9)     divide both sides by 9

-1 = a  

And the x coordinate of the vertex is given by  -b/2a

So we have 

-1 = -b/2(-1)  →  -1 = -b/-2 →  b = - 2

So.....our function is

y = -1x^2 - 2x + 7

So

a + b + 2c =

-1 + (-2) + 2(7) =

11

$$\\4x^2-12x=9\\
4x^2-12x-9=0\\
$you need two numbers that multiply to $4*-9=-36\\
$and add to $-12\\
$I don't think there is an integer answer so you will need to use the quadratic formula.$$$

or you couold use completingthe squares method.

$$\\x^2-3x=9/4\\
x^2-3x+(3/2)^2=9/4+(3/2)^2\\
(x-1.5)^2=18/4\\
x-1.5=\pm\sqrt{(2*9/4}\\
x-1.5=\pm1.5\sqrt{2}\\
x-1.5\approx \pm3.18198\\
$You appear to be after a distance so the neg answer is irrelevant$\\
x\approx 1.5+3.18198\\
x\approx 4.68$$

Thank you! It was correct.

-2(y-4)=20-2y-12     simplify

-2y + 8 = 8 - 2y

8 - 2y = 8 - 2y

Since both sides are the same, there are infinite solutions to this......!!!!

There are four triangles each having an area = bh/2 = (10*13)/(2) in²

So......(4)(10*13)/2 in²   = 260 in²

And the area of the base = 10²   = 100in²

So...the total surface area =  [ 260 + 100]in² = 360 in²

This is a reasonable way to draw attention to a question that you have already asked.  

But

It would be a good idea to copy and paste the address of your question as well.

Then we can go straight to it :))

i have no idea kid sorry

Distributive property.

multiplication distributes over addition :)

Mmm, because of the number 666?

Or parhaps since there may be lots of details in math, and the devil's in the details :)

How did you get your equation Geno.

I can see another method but you seem to have used a 3rd method 

2^40 means 2*2*2* ...*2*2 with 40 factors (numbers to be multiplied). 

Remember that (a^b)^c = a^bc

We know that 2^10 = 1024, hence:

2^40 = 2^(10*4) = (2^10)^4 = 1024^4

you can calculate that on any calculator.

This question is too broad:

How to add matrices?

How to subtract matrices?

How to multiply matrices?

How to transpose matrices?

How to find the inverse of a matrix?

How to solve problems using matrices?

It would also be best if you could give an example of the type of problem that you want explained.

Those arrows on the lines mean that the lines are parallel.

The transversal is the line that cuts the two parallel lines.

Picture moving the bottom line up the transversal until it sits right on top of the upper line.

Now the 70° angle is sitting right across from the angle marked "q".

These two angles together form a straight line (180°), so how many degrees are in ∠q?

To multiply two common fractions,

multiply the numerator times the numerator and the denominator times the denominator:

2/3 x 4/5  =  (2 x 4) / (3 x 5)  =   the answer ...