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Dividing by ZERO is termed    UNDEFINED       <------ YOu cannot divide by zero

If you graph this you will have  3 points

3 hrs  ,  $30        (3,30)

5hrs       $51       (5,51)

6 hrs      61.20    (6, 61.2)

We are looking for the equation  y= mx + b

m = slope   b = y-intercept

slope =  (y2-y1) / (x2-x1)  =   (51-30) / (5-3)  = 21/2   = SLOPE    (or  10.5)

so y = 21/2  x + b      If you sub in one of the points you can find b

     30 = 21/2 (3)  + b

b=  - 1.5

CHECK:     y = 21/2 ( 6) - 1.5 = 61.50    Correct !

First, let's simplify

226 = 2 x 7 x 5    +   2 x 5 x ?    +   2 x 7 x ?

      = 70                + 10?             +   14?             Now subtract 70 from each side

156 =                        10?            + 14?             and combine 'like' terms

156 =                                  24?                        Divide both sides by 24 to find ?

6.5   =       ?

It is impossible, not unknown 

0/0=?

By dividing zero by zero u get 0/0 which is unsolvable 

THAT is ONE set  of numbers that you can multiply together to get 3....look at that answer from yesterday......

We did one just like this yesterday, but instead of  '3' it was 19......

Remember..?   Can you not do what we did there to this problem???

You need  two numbers that multiply togethe to get 3 (which is prime).....there are two combos of numbers to do that....what are they?

Those two number sets  are then added together to get 'b'.......got it?

You have to be more specific about percentage changes: is it INCREASING from $399 to $649, or is it DECREASING from $649 to $399??.

If It is INCREASING, then: 649 / 399 =1.6266 -1 x 100 =62.66% increase.

If it is DECREASING, then: 1 - (399/649) x 100 =38.52% decrease.

365.25 days x 24 hours x 60 minutes x 60 seconds =31,557,600 seconds in 1 year.

tan-1(8.6667)

ans is 1.45592016rad

can u explane without culculator how to do this

tan-1(8.6667)

ans is 1.45592016rad

can u explane without culculator how to do this

8/125 simplified?

Cannot be simplified any further.

14=-(p-8)

14 = -p + 8 subtract 8 from both sides

14 - 8 = -p

6 =-p multiply both sides by -1

p = - 6

Not sure what you want....

(b/2 -b) + a/2 =

-b/2  + a/2   =

1/2 (a-b)  

hallo everyone 

how to do without calcutor

ans is  1.4559

Alan's answer is correct......Another way to see this is that there are 13 numbers beween 5 and 17, inclusive........the number of possible sets formed by choosing an two of these  = C(13,2)

However, we are only interesed in the sets formed by choosing any two of the odd numbers [ since their product is also odd]......and this = C(7,2)  ...so....the probability  =

C(7,2)  / C(13,2)  ≈  0.269

15/100 =0.15

0.15 x 275 =41.25 discount amount.

275.00 - 41.25 =233.75 - discounted 15%

10/100 =0.1

0.1 x 478 =47.8

You can solve using tan^-1=0.5123. This is 27.1261 degrees,rounded.

47.8

That means "absolute" value of x.

what is 10% of 478 =10/100 x 478 =4.78