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So Jocelyn we shall solve this like

-1+x-x=x-8+(-x)

( first step would be subtracting the x's in the first expression which gives a zero so we wouldnt write it)

-1=x-8+(-x)

(now we will take our -8 to the other side and change it to 8 as when bringing a variable or a number to other side we change its sign)

-1+8=x+(-x)

( now we will subtract them both and see what we get)

7=0

so sorry this question isnt correct or i dont know , maybe i didnt solve it properly but i checked in the calculator on the hme page and it doesnt give a proper answer so i guess theres a problem in the question!

2+7+(5+7//2x6-8)

9(12//12-8)

9(12//4)

108//36

108 divided by 36 equals 3.

2% of 400 = 8

thats really good Anonymous thats your liking the forum!and your welcome!

Its going great, Thanks! :D

Just line up the decimal points, add trailing zeros (if necessary), and add   ...Example.....

2.3 + 1.2222   So we have

   2.3

+ 1.222

=

   2.300

+ 1.222

= 3.522

21

to eospffaeEWFWEF

You put $5,000 in an investment account today which will earn 6% over the next 11 years, what is the future value?

A = 5000(1 + .06)¹¹ = about $9491.49

You are going to be given $100,000 in 12 years. Assuming an interest rate of 3.5%, what us the present value of this amount?

We have....(assuming yearly compounding)

100000 = A(1 + .035)¹²   where A is the present value  ....  divide both sides by  (1 + .035)¹²

100000 / (1 + .035)¹²  = A  = about $66178.33

t(-4) = l -3 + 2*(-4) l  = l -3 - 8 l   =  l -11 l  = 11

And t(t(-4)) = t(11) = l -3 + 2*(11) l  = l -3 + 22 l   =  l 19 l  = 19

If the inverse returns 4, then the original function substitutes 4 for x

So we have

3(4)³ + 2 =  3*64 + 2 = 194   and that's "x" in the inverse

So (4, 194) is on the original graph and (194, 4) is on the inverse

a + b = 9   →  b = 9  -a

a*b = 20   →  a(9 - a) = 20  → -a² + 9a = 20 →   a² - 9a + 20 = 0   and factoring, we have (a - 5) (a - 4) = 0

So  a  = 4 or 5    ....either way, we will be adding the fractions

1/4 + 1/5   =  9 / 20  = .45

The answers are -1, 0,2, 3 right?

I would say it's about $${\mathtt{2.986\: \!431\: \!478\: \!97}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{{\mathtt{1}}}$$

Sorry...I made a slight mis-type when after I factored the polynomial.......see the corrected answer in my response.....it is correct!!

It would be $12.

Found on the calculator on the main 

It's about:

 $${{\mathtt{3}}}^{-{\mathtt{1.9}}} = \left({\frac{{\mathtt{1}}}{{{\mathtt{3}}}^{{\mathtt{1.9}}}}}\right) = {\mathtt{0.124\: \!013\: \!686}}$$

If we have  2+7+(5+7/2*6-8)    ....evaluate inside the parentheses......and remembering that we perform multiplication/division as we encounter them from left to right, we have.....

2 + 7 + (5 + 3.5 x 6 - 8) =

9 + (5 + 21 - 8) =

9 + (26 - 8)  =

9 + 18  =

27

My teacher said that this answer was wrong.

wait, is that negative POINT 838? or is it just -838? Sorry!

$$a*b =\frac{1}{a} + \frac{1}{b}

Hence:

a*b = (a+b)/(a x b)

a+b = 9 , a x b = 20

a*b = 0.45$$

That is 27.......you mistyped it though