All Answers 355975 Answers

1 mile =1.609344 km

5 / 1.609344 =3.106856 miles.

To torture you

Math exists because you will need it in later life. 

not sure, the calculator is right there and majority of the  problems are ez

-2(2n - 6)

Distributive property:
-2(2n) + (-2)(-6)

-4n + 12

40 and 41

Look up pythagorean triples for an explanation.

no, its an integer but only positive numbers can be whole numbers

sin(theta)x(sin(theta)-cos(theta))?

what about it?  Do you want it to equal something ?

\(sin\theta(sin\theta-cos\theta)\\\)

What is root 18x minus root 2x and how?

\(18x - \sqrt{2x}\qquad \text{cannot be simplified}\\ 18x-\sqrt2\;x =x(18-\sqrt2)\qquad \text{That is factorized, not simplified}\)

Use the calculator if you cannot do it in your head - and find out

72 divided by 4 must be a whole number.  :))

Divide 49000 by 7000 and you will get 7.

how would you do this question: How many 7 digit even numbers less than 3000000 can be formed using all the digits 1,2,2,3,5,5,6 ? I have tried using permutations and subsets but it doesnt seem to work.

It must start in 1 or 2 and it must end in 2 or 6

1 - - - - - 2             5! /2!  ways

1 - - - - - 6             5! / 2!2!  ways

2 - - - - - 2             5! / 2! ways

2 - - - - -  6            5! / 2!  ways

Total

5!/2  +  5!/4  +  5!/2  +  5!/2 = 1.75*5! = 210 

Does that agree with your answer?  If not, what is your answer?

I have a question

How about this

\(3^2\div 3^2 = 3^{2-2}=3^0\\ but\\ 3^2\div 3^2 = 9\div 9 =1\\ \therefore\\ 3^0=1\)

A number n is more than 9 units from 3.     This one made me think LOL  :)

\(|x-3|\le9\\ -9\le x-3\le9\\ -9+3\le x\le9+3\\ -6\le x\le12\\\)

Only because you do not know how to do it yet.

Everything is hard at first.

1.5t+7=3t-9

1st subtract 1.5t from both sides. You get     7=1.5t-9

2nd you add nine to both sides. You get      16=1.5t

3rd You divide both sides by 1.5. you get      

Answer:  10.6666666667=t    or    16/1.5=t

3/7 devided by 2/3, which is the same as 3/7 times the reciprocal of 2/3, 3/2, which equals 9/14

3/7 : 2/3 = 3/7 * 3/2 = 9/14

d^4.37 =0.248    take the log of both sides

log d^4.37 = log 0.248       and by a log property, we can write

4.37 log d  = log 0.248       divide both sides by 4.37

log d =  log 0.248 / 4.37

In exponential terms, this says that

10^ [  log 0.248 / 4.37]  = d  ≈ 0.726826

-1 - 1/9   =

-9/9  - 1/9  =

[ -9 - 1 ] / 9   =

-10 /  9     or      - [ 1 + 1/9]

I assume this is :

48 -  [ - 13.6 ] + [ - 81.175 ]    .....if so......  a  minus outside brackets/parentheses changes the sign on everything inside.......a plus outside brackets/parentheses changes nothing....so we have......

48 + 13.6 - 81.175  = 

-19.575

if Y=2/4, then it would just be 2/4-1/2. In order to do this problem you would have to find common multiples for the denominators, or just divide 2/4 by 2 making it 1/2. The least common multiple for these two fractions would be 4, so in order to change 1/2 is by multiplying the whole fraction by 2/2 making it 2/4. 2/4-2/4 would just equal 0 :/

-1-1/9=(-1 1/9)

0.7

it just does