All Answers 358512 Answers

10,000 is 10000.

There is no difference between the comma and the regular style, Commas are just used so that you can pause when you say it like when you say 100,000,000 instead of having to say 100000000 in one breath.

From: The Ultimate Guest

3y-2y=1/8

y=1/8

I assume that you have seen these on calculators.

They have to do with finding angles and side lengths of right angled triangles.

Well anyway that is what you use them for when you first learn them.

It is a very big mathematical subject called trigonometry. :

how to solve x*y=300 2x+2y=70

X+y=35

X=35-y

y(35-y)=300

-y^2+35y=300

Y^2-35y+300=0

(Y-15)(y-20)=0

Y=15,    x=20

or

y=20,    x=15

(88 + 94 + 90)*150 + p*250 = 93*(3*150 + 250)

40800 + 250p = 65100

250p = 24300

p = 24300/250

p = 97.2%

perimeter = 2*length + 2*width

so:

40 = 2*18 + 2*width

40 = 36 + 2*width

subtract 36 from both sides

4 = 2*width

Divide both sides by 2

width = 2 (cm)

When w = 0, the denominator will = 0   and this is undefined......so....0 makes the rational expression undefined

Area = L * w

L= 2w

72=2w*w

72=2w^2

36=w^2

6=w

L=2*6

L=12

Width = 6ft

Length= 12ft

Check:

12*6= 72

Let the other leg=L, then the hypotenuse is:

L +2. Now, we use Pythogoras' theorem:

(L + 2)^2=L^2 + 4^2

Solve for L:
(L+2)^2 = L^2+16

Subtract L^2+16 from both sides:
-16-L^2+(L+2)^2 = 0

Expand out terms of the left hand side:
4 L-12 = 0

Factor constant terms from the left hand side:
4 (L-3) = 0

Divide both sides by 4:
L-3 = 0

Add 3 to both sides:
Answer:  L = 3 feet               Hypotenuse=3+2=5 feet
| L = 3

GCF=GCD

GCD=(3x^8, 3x, -42)

Let one page be n, then

n+1 is the 2nd page, but we have:

n(n+1)=306

n^2 + n=306, or

n^2 +n -306=0, factoring gives,

(n-17) (n+18) = 0

n=17 or n=-18 we discard the negative solution, and we have:

n=17 and 17+1=18, because

17 X18=306.

n

The pages are page 17 and 18.

17*18=306

Since you need an average of 93%, therefore:

(93 X 4) - (88 + 90 + 94)=100%. Your final score has to be 100%, so that your average over 4 tests will be 93%.

If you mean your statistics question I dont understand it either. Sorry :/

For this, we must solve...

125/100=25/x

Cross multiply by multiplying each numerator by the other fraction's denominator and you get...

125x=2500

Sivide by 125 on each side...

x=20

I think you can use the work I've shown you here to figure out the other problems you have. 

For this, we must solve...

250/100=x/146

Cross multiply by multiplying each numerator by the other fraction's denominator and you get...

100x=36500

Sivide by 100 on each side...

x=365

Guest, I'm glad you found this forum, but could you at least try to learn from our answers and figure out at least part of your homework?

what is the value of x if cos x = sin(20+x)

You have sine and cosine

The co stands for complementary

Complementary angles add to 90 degrees.

So

20+x=90-x

2x=70

X=35

Let the number be=n

125%n=25

1.25n=25 divide both sides by 1.25

n=25/1.25

n=20

250% X 146=

(250/100) X 146=

2.50 X 146=365

3252 pieces of food (he's eating food, right?) - 1356 pieces eaten = 1896 pieces of food left (again, assuming it's food that Bob's eating)

69*65=4485

You can access the site's calculator by clicking on the "HOME" tab athe top of the page.

For this, we must solve...

20/100=30/x

Cross multiply by multiplying each numerator by the other fraction's denominator and you get...

20x=3000

Sivide by 20 on each side...

x=150

Let the number be=n

20%n=30

.20n=30 divide both sides by .20

n=30/.20

n=150

Our guests answer is good but I will just show you how to do it formally,

Let the first number be x

and the next even number will be x+2

x(x+2)=168

x^2+2x-168=0

I want two numbers that multiply to -168 and add to 2

Since they multiply to a negative,  one has to be neg and one pos

Since they add to a pos the 'biggest' one is positive

factor(168) = (2^3*3)*7

168=2*2*2*3*7 = (2*2*3)*(2*7) = 12*14

so the numbers are  14 and -12

(x+14)(x-12)=0

x=-14 or 12

so the integers are  -14 and -12 

or

12 and 14

just like our guest already said.  :)

Excuse me?