All Answers 356066 Answers

40 + 2x = 90

Subtract 40 from both sides.

2x = 90 - 40

2x = 50

Divide both sides by 2.

x = 50/2

x = 25

area = length × width

area = 94 feet × 50 feet

area = 4,700 square feet

\(\frac{\text{central angle of sector}}{\text{360 degrees}}=\frac{\text{area of sector}}{\text{area of circle}}\)

I believe the correct explanation is number 4. 

Here is a before and after drawing of the scenario:

The question is what is y?

First we can solve for x.

Use Pythagorean Theorem.

x² + 20² = 25²

x = 15

Now use this info about x to solve for y with Pythagorean Theorem..

(15 - 2y)² + (20 + y)² = 25²

Multiply this out.

(15 - 2y)(15 - 2y) + (20 + y)(20 + y) = 625

225 - 60y + 4y² + 400 + 40y + y² = 625

Combine like terms and write in descending order.

5y² - 20y + 625 = 625

5y² - 20y = 0

Divide everything by 5.

y² - 4y = 0

Factor.

(y)(y-4) = 0

Set each factor equal to zero and solve for y.

Either y = 0 or y = 4

It doesn't make sense for y to be 0, if y was 0, it would be the exact same triangle we started with!

y = 4 feet

1/20

No problem!

thank you so much!!!!

When typing in the calculator, use / 

So let's say I wanted to put 3 over 4, I would put 3/4

If you mean when asking a question, go onto LaTeX, which is beside Image, and click on it

Then to put in a fraction, you would type \frac then put in your numbers like this {}

Ex.    \frac{3}{4}

This is what it looks like:   \(\frac{3}{4}\)

The answer is y=-3x+2

Never Mind.. I see what I got it wrong 

life is the answer

3x + 2y = 8     multiply through by  2 →   6x + 4y  = 16     (1)

2x + 5y = -2    multiply through by -3 →  -6x - 15y = 6      (2)

Add (1)  and (2)  and we get

-11y  = 22     divide both sides  by (-11)   and  y  = - 22/11   =  -2

Sub this into 3x + 2y  = 8 to find x

3x + 2(-2)  = 8

3x - 4  = 8       add 4 to both sides

3x  = 12        divide both sides by 3

x = 4   

5ax² - 2bx² - 15ay + 6by

Factor an x² out of the first two terms, and factor a -3y out of the second two terms.

x²(5a - 2b) - 3y(5a - 2b)

Factor (5a - 2b) out of these two terms.

(5a - 2b)(x² - 3y)

688205=x(4)^10

688205 = x * 1048576       divide both sides by 1048576

688205 / 1048576   =  x  ≈  0.656

Nope.  Posted earlier that I thought the hearts were cheesy and the symbol should be something math-related like # or the pi symbol !   Just not feelin' the heart thingie ....

QT * RT   =  ST^2

30 * 7  = ST^2

210  = ST^2     take the square root of both sides

sqrt (210)  = ST

ST ≈ 14.49

126 / 2   =  63

So......  63 dogs  and 63 cats

I think I answered the first one, yesterday.....anyway

ZY  *VY  = XY^2

28 * 9    = XY^2

252  = XY^2      take the square root of both sides

sqrt (252) = XY

sqrt (36 * 7)  = XY

6sqrt(7) =  XY  ≈  15.87

2. The sum of Angles B and D  = 180

So

2x + 3x - 5   = 180

5x - 5 = 180   add 5 to both sides

5x = 185        divide both sides by 5

x = 37

And A =   x + 5  = 37 + 5   =   42°

3.  60 degrees is (1/6) of the circle's circumference....so..

The arc length is   2 pi r / 6  =   2 pi (5.4) / 6  =  (10.8 / 6) pi   =  (1.8)pi meters

m∠B + m∠D = 180º

Substitute.

(2x + 3) + (4x + 3) = 180º

Combine like terms.

6x + 6 = 180

6x = 174

x = 29

Now that we know what x is, we can find m∠C

m∠C = 2x + 1

m∠C = 2(29) + 1

m∠C = 58 + 1

m∠C = 59º

I agree with you

I don't think infinity is a number...it is more like a concept of a never ending parade of numbers....or space.And I agree with ElectricPavlov.

Lol how about the hearts for points EP?

You gotta at least like them a little x)

Thats so true honestly

No, you cannot download the calculator.