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Correction to my previous answer.....it's only concave up  on   (0, inf)

The graph is never concave down....thus....no inflection point exists

Think of multiplying fractions by whole numbers such as this one as simply multplying fractions by fractions.

Since 3 is a whole number, we can call it 3/1.

When we multiply (7/8) by (3/1) we only multiply the numerators (3 and 7) by each other and the denominators (8 and 1) by each other.

Here's a visual of what your work should look like:

(7) * (3) = 21

(8) * (1) =  8

Any other questions?! Just ask!

First, you divide the numerator of 7/8 by the denominator. Now with the terminating decimal, you can multiply as usual by 3. 

Papi is dad in spanish

We can write this as :

f(x)  = e^x  *  x^-4

Take the frist derivative  and set to 0

  e^x  * x^-4   + e^x * (-4 x^-5)     = 0

e^x * x^-4   -  4 e^x * x^-5   = 0    factor

[e^x * x ^-5]  [  x - 4 ]  = 0 

The first factor is never 0 .....  x - 4  = 0      means that we have  a critical point at  x = 4

Look at the graph : https://www.desmos.com/calculator/otj7wmmxcg

a)   It increases from  (   -inf , 0)   and from (4, inf)

      It decreases from  ( 0, 4)

b)  The graph is concave -up at all points where it exists

c)  Since the graph never changes concavitiy....there is no inflection point

.58x = 2.03

Divide by .58

You get 3.5 pounds. I can't tell you how many tomatoes, though.

2x^2 - 3x + 1 = 0        I think you mean "Completing the Square"  method

Divide through by 2, the lead coefficient 

x^2  - (3/2)x  + 1/2   = 0    subtract 1/2 from each side

x^2 - (3/2)x   =  -1/2         take !/2 of (3/2)   =  3/4  ....square this   =  9/16   and add to both sides

x^2 - (3/2)  + 9/16   = -1/2 + 9/16

x^2  - (3/2)x  + 9/16  = 1/16   factor the left side

[ x  - 3/4] ^2   = 1/16       take the square root of both side

x -3/4  = ± √ (1/16)

x - 3/4  =  ± (1/4)    add 3/4 to both sides

x  = ± (1/4)  + 3/4

x = 1/4 + 3/4   = 1      ...   or   ....   x  = -1/4 + 3/4  =  2/4  = 1/2

I'm not sure what "Factored by Graphing" means....but...if you're trying to find the solutions to this, we have

2x^2+2x-12=0     divide through by 2

x^2 + x  - 6  = 0   factor

(x + 3) (x - 2)  =0  

Setting each factor to  0 we have

x + 3= 0     →   x = -3

x - 2  = 0   →   x = 2

what's the context?

a²+b²=c²

plugging in the numbers would give 8²+15²=c² or 64+225=c²

add up and you get 289=c², or c=17

(4/5) / (6/7)    invert the second fraction and multiply

(4/5)  * ( 7/6)   = 

28 / 30  =

14/15

n - 3  = -18     add 3 to both sides

n  = -15

Give us the identities that you're having trouble with......it's hard to answer this in any specific terms....

The grapher on here isn't very good  [IMHO ].....I like Desmos for most graphs......it won't do "complicated"  graphs  but it will handle most 2-D  graphs just fine

It's here :  https://www.desmos.com/calculator

0.712     ....   the   hundredths digit  is 1

If the next digit to the right of this is 5 or greater, we round the 1 up to 2  ....however...in this case it's not so we just keep the 1  ....so we have

0.712  =   0.71   {rounded to the nearest hundredth ]

3 = (1/4)sec(0)+c       note......sec(0)  = 1    ........so we have

3 = (1/4) (1)  + c 

3 = (1/4) + c     subtract (1/4)  from each side

[3 - 1/4 ]  = c  =   [ 2 + 3/4 ] =    2.75

No prob....glad to help  !!!

% decrease     =  (  [  Old Value - New Value]  / [ Old Value]  x  100 )  %

Example......something was $10 but now it's $8  ....so we have

  ( [ 10  - 8] / [10 ] x 100 ) %   =

(  [2 / 10 ] x 100 ) %  =

( (2 * 100) / 10 ) %  =

( 200 / 10 ) %  = 

20 %       (decrease)

Mmmmmkay

Now I understand this a lot better

Thank you, thank you.

:D

That actually does help CPhill. I'm sorry I didn't respond sooner. I had to come to work and am just now getting a chance to see this. I really do appreciate the help.

90 minutes = 1.5 hrs

So....

5kW  x  1.5 hrs x  8 cents per kW hr  =  5 (1.5)(8)  =  40 * 1.5   =  60 cents

1.94 or 1 47/50

There is your answer!!! 

enter  1  x  4  x 10  then the x^y button  then enter your exponent  ....be careful to use parentehses if it is a fraction or other expression....

4.2 %  is 1.05% per period (3 months...or 'quarterly

(1+i)^4  =  1.0105)^4 = 1.042666      or    4.2666% annually

I know that :|

I was saying he should check (even tho he was right)