All Answers 358510 Answers

 -4x-6x equals -10x, so tou get -20=-10x, devide both sides by -10, and you end up with x =2

i like it bc its good helper

make both sides even

20=(4*6)x

20/24=24x/24

.83333333....=x

at least i think it does, you may want to check my work

what points would (2,3),(4,6) and (6,3) be after a rotation of 90 degrees counter clockwise

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The coordinates "reverse" and the "x" becomes "negative"...i.e..... (2,3) ⇔ (-3,2)

Factor it: x² + x - 12 = 0

This equation is in the ax² + bx + c form, so c is -12

Since c is negative, you know that the factoring would have one positive x-value and one negative x-value; a positive number times a negative number would be negative.

So now you know that it will be:

(x + __ ) * (x - __ ) = 0

Now find the factors of -12 that will add/subtract to get positive 1 (since your b-value is 1x.) -3 and 4 multiply to get -12, and add to get 1

Therefore, it would be:

(x + 4) * (x - 3) = 0

So x would be the number that makes the value in the parentheses equal to 0.

-4 + 4 = 0 and 3 - 3 = 0

So x = - 4, 3

Sorry CPhill, but you need to look again at that fourth step.

If it could mow my lawn, that would be good  .

I choose to interpret sqr as meaning square root, in which case it could be

$$\sqrt {a}-4=5,$$

$$a=81,$$

or it could be

$$\sqrt {a-4}=5,$$

leading to

$$a=29,$$

who knows ?

if sadia picked 2/5 of a basket of berries, Tashi picked 1/3 of a basket, shafma picked 4/7 of a basket and marzuk picked 4/5 of a basket do all of their berries fit into 2 baskets?

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OK......if we add all the fractions and we get a number less than "2" they will

Start by adding the 4/5 and the 2/5 = 6/5

To this add 1/3    so we have

6/5 + 1/3   and getting a common denominator, we have

18/15 + 5/15 = 23/15

To this add the remaining 4/7

So we have

23/15 + 4/7      and getting a common denominator, we have

161/105 +  60/105 =   221/105 = 2.1

So the berries won't all fit into 2 baskets  

Thanks, kitty <3 !!!

Here's another way to do this....it's a "trick" I used to use when I tutored...

Take the points and "reverse" them.....we have (2, -1) and (3, 3)

Line them up like this and draw a line under them

(2 , -1)

(3 ,   3)

______      Now just "subtract" the "underneath" things from the things "overhead" - individually - like this

(2 , -1)

(-3 ,  - 3)

________

-1  ,  -4

Now.......put the thing in the first column "over" the thing in the second column   (-1) / (-4)  = 1 / 4 and Voila!!.......there's the "slope" 

Hi Mathbug,

Anonymous correctly answered both your questions; this is how you get there:

1000x200

Multiply 1*2 = 2

Then just add in the 3 zeros from 1000 and the two zeros from 200 at the end:

= 200000

For 1000x2000, do the same thing, but since 2000 has three zeros instead of two, it would be

2000000

what is the slope of the line that contains the points (-1,2) and (3,3)

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Slope is defined as  ⇒  "Change in y"  /   "Change in x" 

Here's a "non-technical" way to figure this....

How much did  "y" change by from the  first point to the second ???.....Answer... (+1) ....it increased from 1 to 2

How much did "x" change by from the first point to the second ???.....Answer... (+4).....it increased from -1 to 3

Therefore ..... Change in y"  /   "Change in x"   ⇒  (+1) / (+4)  = 1 / 4   ....and that's the "slope"

If either "x" or "y" had decreased (but not both), our slope would have been negative....

Slope of a line is the change in y (rise) over the change in x(run).

The formula for m, slope,  is $${\mathtt{m}} = {\frac{\left({\mathtt{y2}}{\mathtt{\,-\,}}{\mathtt{y1}}\right)}{\left({\mathtt{x2}}{\mathtt{\,-\,}}{\mathtt{x1}}\right)}}$$

So just plug in your x and y values:

m = (3 - 2) / (3 - -1)

= 1/4

I like it cause it helps me out and I am only still young and...IF YOU DONT LIKE THIS WEBSITE THEN GET OFF OF IT!!!!!!!!!! 

 .        .

-_____-

how do i find the inverse matrix?

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Describing how to do this by hand is a lengthy process that can sometimes be very "messy"........

Here's a website that covers it.......

1000x200=200000

1000x2000=2000000

correct 17

79% is the same as 0.79

So just multiply 0.79 and 12

= 9.48

Renaldo is making purple paint using red and blue paint. The ratio of red paint to blue paint is 5 to 4. If Reynaldo has 6 quarts of blue paint, how much red paint does he need?

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Let's set this up as a ratio......

5 /4 = (quarts of red paint) / (quarts of blue paint)       so we have

5 / 4  = x / 6          where "x" is the number of quarts of red paint we're looking for

Cross-multiplying, we have

30 = 4x         divide both sides by 4

x = 7.5

17 is your answer

you simply make it a decmil if 4 were 1/4 i would put 4.25