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3 years ago

13

I have no clue how to do any of these problems so if anyone knows any an explanation would be nice.

1 answer:

Sever21 [200]3 years ago

7 0

#1). The length of the whole circumference is (π · D) = 12π .

   120° is 1/3 of 360°, so arc-AB is 1/3 of the whole circumference.

#2). 60° is 1/6 of 360°.
   So arc-CD is 1/6 of the whole circumference (which is given).

#3). The circumference of the circle is (π·D) = 20π .

   70° is (70°/360°) of the whole circle, so arc-XY
   is (70/360) of the whole circumference.

#4). Sorry, I don't remember anything right now about
   angles between chords.
   I hope what I've given you so far is worth 5 points.

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Evaluate -1/3-(-4/9)

bija089 [108]

Answer:

To subtract fractions, find the LCD and then combine.

Exact Form:

1/9

Decimal Form:

0.¯1

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3 years ago

HURRY Which is an equation in point-slope form for the line that passes through the points (−1,4) and (3,−4) ?

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Answer:

y-4=-2(x+1)

Step-by-step explanation:

y-y1=m(x-x1)

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m=-8/(3+1)

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3 years ago

9.72÷9 ___________________

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Answer:

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crimeas [40]

The correct answer is A

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3 years ago

Help with quadratic graphs asap!

zlopas [31]

x= -0.25 and 1.25

x = -0.5 and 1.5

x = 0 and 1

x = -0.375 and 1.625

Step-by-step explanation:

Given equation of the curve is

$y = 4x^2 -4x-1$

(i)

First equation $4x^2 -4x-1 =0$

Here y = 0

In x-axis the value of y = 0

The graph cuts the x-axis at(-0.25,0) and (1.25,0)

So, x= -0.25 and 1.25

(ii)

$4x^2 -4x-1 =2$

here y = 2

The line y= 2 cuts the curve at (-0.5,2) and (1.5,2)

So, x = -0.5 and 1.5

Given equation of the curve is

$y= 3x^2-3x -1$

(i)

$3x^2-3x +2 =2$

$\Leftrightarrow 3x^2-3x -1 = -1$

Here y = -1

The line y = -1 cuts the curve at (0,-1) and (1,-1)

So x = 0 and 1

(ii)

$3x^2-3x -1 =x+1$

Here y = x+1

The line y -x =1 cuts the curve at (-0.375,0.5) and (1.625,2).

So x = -0.375 and 1.625

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3 years ago