All Answers 358180 Answers

+3146

0

[input]plot(2x^2+5x+1, x=-4..4, -4..10)[/input]

adminAug 20, 2013

0

Plug in x and solve for y....

x = -1
y = 2x^2+5x+1 = 2(-1)^2+5(-1)+1 = -2

x = 0
y = 2x^2+5x+1 = 1

x = 1
y = 2x^2+5x+1 = 10

x = 2
y = 2x^2+5x+1 = 19

GuestAug 20, 2013

+3146

0

[input]3.92[/input]

adminAug 20, 2013

0

2+3/10/5*6-(7+8)

PEMDAS tells us that we can solve this easily

2+3/10/5*6-15
2+3/10/30-15
2+0.01-15= -12.99

GuestAug 20, 2013

0

without an X or Y value I can't help you solve the equation itself.

GuestAug 20, 2013

0

65/15=4 5/15 = 4 1/3

GuestAug 20, 2013

0

GuestAug 20, 2013

0

623.5x623.5x7.5 = 2915641.875

GuestAug 20, 2013

0

GuestAug 20, 2013

Aug 19, 2013

0

If we consider the amount of combinations for the places, then its (25!)²

GuestAug 19, 2013

0

GuestAug 19, 2013

0

Is it (1/3)*(2x-7) = 4 OR 1/(3*(2x-7)) = 4 ??

1. (1/3)*(2x-7) = 4 [ *3]
2x-7 = 4*3 [+7]
2x = 12+7 [/2]
x = 19/2 = 9.5

2. 1/(3*(2x-7)) = 4 [inverse]
3*(2x-7) = 1/4 [/3]
2x-7 = 1/(4*3) [+7]
2x = (1/12)+7 = (1/12)+(84/12) = 85/12 [/2]
x = 85/(12*2) = 85/24

GuestAug 19, 2013

0

Factorising this gives you:
(x+4)(x-1) = 0
You get this because +4 and -1 add together to make 3 (the number in front of the x) and multiply to make -4 (the number on its own).

Now you know that either:
x + 4 = 0
or
x - 1 = 0
(Because when two numbers multiplyed together make 0, one of them must be zero).

This leads to the answer:
x = -4 or x = 1

GuestAug 19, 2013

0

Factorial n! is: 1*2*3*...*(n-2)*(n-1)*n
e. g.: 5! = 1*2*3*4*5 = 120

GuestAug 19, 2013

0

Could you also teach me how the n! works?

GuestAug 19, 2013

0

Remember that density= mass/volume.

You know the average mass, so all you need is the volume. If they are sugar cubes, then that means that each side is approximately the same length, so the volume of a cube is:

V=a^3

Where a is the length of the side of the cube. Crunch the numbers and you'll get your answer.

GuestAug 19, 2013

0

[input]25![/input]

GuestAug 19, 2013

0

Simply multiply the numerators together and the denominators together.
6/11 * 5/9
= 30/99
simplify by dividing by 3
= 10/33 !

GuestAug 19, 2013

Aug 18, 2013

0

x!+1=y2 calculator gives wrong y. if x=32.do reverse by given y, you will find wrong x.

GuestAug 18, 2013

+3146

0

[input]expand((2x+3)^3)[/input]

adminAug 18, 2013

Aug 17, 2013

+259

0

sin 2x = -cos(x-10) => sin 2x + cos(x-10) = 0 => sin 2x + sin(pi/2 - (x-10)) = 0 (here the reduction formulas were used), then use the formulas of sum transformation into the product.

Edited, since I commited mistake. Sorry for that.

scrutinizerAug 17, 2013

+259

0

15 + 3 = 18 parts

scrutinizerAug 17, 2013

+259

0

(2x+3)^3 = 8x^3 + 3*4x^2*3 + 3*2x*3^2 + 27 = 8x^3 + 27 + 3*2x*3(2x + 3)

scrutinizerAug 17, 2013

+3146

0

n = (T1-T2)/T1 = 1-T2/T1

T2 = 224 deg

n = 1-T2/T1
n-1 = -T2/T1
T1 * (n-1) = -T2
T1 = -T2/(n-1)

[input]-224 / (0.7946-1)[/input]
1090.55 degree Celsius.

adminAug 17, 2013

+3146

0

4.5=4+1/2= 2*4/2+1/2=8/2+1/2=9/2

reciprocal of 9/2 is 2/9

[input]1/4.5[/input]

adminAug 17, 2013

0 Online Users