2.44 x 10^3  =  2440.

1.9 x 10^5  =  190000.

When you add them, you do not get 1.9.

-7(k+9)=9(k-5)-14k

Use the distributive property by multiplying -7 and 9 into their respective parenthesis

-7k-63=9k-45-14k

Use the communitive property to rearrange the right side so the numbers that both have the variable "k" are together. Then, simplify.

-7k-63=9k-14k-45

-7k-63=-5k-45

Add 7k to both sides; on the left, it eliminates -7k, and on the right, it comes together with -5k. Simplify the right side.

7k-7k-63=7k-5k-45

-63=2k-45

Now, add 45 to both sides to get rid of -45 from the right and combine it with the -63 on the left.

-63+45=2k-45+45

-18=2k

Finally, divide by 2 on both sides. -18/2 is -9, so therefore:

k=-9

When you start with a ratio like  14:4,

you can write it as a common fraction:  14/4,

and as a common fraction in reduced form:  7/2.

Sometimes, it is valuable to have one of the terms 1, such as 3.5/1.

This ratio would be difficult to write with a numerator of 1, but if the ratio were  4:14,

it could be reduced to 1:3.5.

You would like to have two numbers in your answer, so for 4:14, you probably wouldn't want to write it as a decimal:  0.285714285714...

And, you wouldn't want to write 14:4 as a mixed fraction  3 1/2/ 

If people are learning maths at an appropriate level (for their prior knowledge and intelligence levels) then it should  be more or less equally easy for everyone.

Every positive integer can be written as a power on some base > 1.

To see this, let "a" be some positive interger.

Then, using logs and assuming that b > 1, we have.....

log_b a = x  ...... which says, exponentially, that

b^x = a

And we have written "a" in terms of a power on a base > 1

No, he’s not. Except for a few subroutines, the “Calculator” and web site “Forum” is the work and labor of one man, Andre Massow. He is one of the most brilliant mathematicians and programmers on the planet.

“FREAKING STUPID IDIOT” does apply to some of the users, like you.

Well...what's 5 times 4  ???

And what's 5 + 2 ???

Put the first answer over the second.....there's your final answer....

18 / 694

Well, 18 is almost 20 .....   and  694 is almost 700

So. 20/700 = 2/70 = 1/35

Out of 10 children, 7 are boys. So, since we have 3 sets of 10 children, these 3 sets must have 3 X 7 = 21 boys.

You can set up a proportion:  30 girls / n boys  =  3 girls / 7 boys

Cross-multiply:  3 x n  =  30 x 7

                           3n  =  210

                             n  =  70

700 ÷ 20  =  35

f(x) = x^1/3

Using the Power Rule, we have

f '(x)  = (1/3)x ^-2/3

thank you 

thank you very much

it is 4 man do you know your math facts

5 ^ (1/2)  =  √5

Whole numbers are:  0, 1, 2, 3, 4, ...  (none of these, when squared will give you 5)

Integers:  ..., -4, -3, -2, -1, 0, 1, 2, 3, 4, ...  (again, none of these, when squared will give you 5)

Rational numbers are common fractions; √5 cannot be written as a common fraction; it can be written as a decimal fraction but the decimal never ends and never repeats; thus, it is an irrational number.

zero can be written as a power. if it is, no matter the number, the answer is 1

5^(1/2)  = √5       ....this is definitely an irrational number....!!!!!

yes it can man

to write an exponent, you get your original number and write the exponent about half the size of the regular number towards the top of your original number on the right side.

you can use ^ before the exponet for example 3^2 is 9

Use '^'.      5^4  =  5 x 5 x 5 x 5  =  625

Distance  =  Rate x Time

6.8 miles  =  (2.72 miles per hour ) x t

    6.8  =  2.72 x t

Divide both sides by 2.72

  6.8 / 2.72  =  t

t  =  2.5 hours