Calculus

|x|+|y|=20 is same as x- y=20 -x+y=20 x+y=20 -x+y=20 these are adjacent sides of a square consider x+y=20 the intercepts on x and y axes are 20 each so area of triangle=.5*20*20=200 (the square is divided into 4 equal triangles by x and y axes) so the required area=4*200=800 units the idea will become more clear if u just draw a rough figure

length, width and height (:

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1 : 5 ratio

I know one and that's Pythagoras

When you do not understand something and just miss it out.

1 remainder 72

Around 2 and a half hours.

-5?

One millimetre is equal to 1000000 nanometres. Therefore, one nanometre is equal to 1/1000000 = 0.000001 millimetres.

The answer depends on syllabus for WHAT!

-(2)Squared = 4

Take 3 from each side: 8x = 56

Divide by 8: x = 7

Next business?

This system has the unique solution (7, -1). Solving the first equation for x and substituting gives us y = -1; substituting that into either of the original equations gives x = 7.

You can see the steps in between using the link in the "related links" section below.

click esc on your keyboard ( which opens up your spellbook), then click quit at the bottom of the screen. when it brings you to the character selection click exit again.

If you graph this it will be a parabola that has each end pointing down. It crosses the x-axis at:

y=-2x^2+3x+5

y=-1(2x^2-3x-5)

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

y=5/2

y=-1

639 = 32 x 71

x + 3 = 2x + 4

Subtract x from both sides: 3 = x + 4

Subtract 4 from both sides: - 1 = x

y = x + 3 = -1 + 3 = 2

The solution is (x, y) = (-1, 2)

Three ranges.

-17

-1

Put in function/point slope form.

X - 3Y = 6

- 3Y = - X + 6

Y = (1/3)X - 2

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zero out the Y

(1/3)X - 2 = 0

(1/3)X = 2

2 divided by 1/3 same as 2 * 3/1 = 6

X = 6

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of course you can just zero out the Y in original equation

X - 3(0) = 6

X = 6

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x/2 + 29 = 24

Subtract 29 from both sides: x/2 = -5

Multiply both sides by 2: x = -10

A single linear equation in two variables cannot be solved: you need two independent equations.