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Art [367]
3 years ago
12

If we know the diameter of a circle is 10 cm, how long will the circumference be?

Mathematics
2 answers:
Mkey [24]3 years ago
8 0

Answer:220/7 or 31.4

Step-by-step explanation:

circumference of circle= 2*pi*radius

radius= half the diameter so its equal to 10/2=5

so C=2*22/7( or 3.14)*5=220/7(or 31.4)

mihalych1998 [28]3 years ago
7 0

Answer:

C= π*d

c=  π*10

c= 10 π

c=  10 * π

c= 10*3.14= 31.4 cm

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Nesterboy [21]

ANSWER:

x, 2x + 1, x -2

STEP-BY-STEP EXPLANATION:

We have the following expression:

2x^3-3x^2-2x

We simplify as follows to determine the factors:

\begin{gathered} \text{ We factor the common term:} \\  \\ x\left(2x^2-3x-2\right) \\  \\ \text{ Now we factor the following term} \\  \\ 2x^2-3x-2 \\  \\ -3x=x-4x \\  \\ 2x^2+x-4x-2 \\  \\ \left(2x^2+x\right)+\left(-4x-2\right) \\  \\ x\left(2x+1\right)-2\left(2x+1\right) \\  \\ \left(2x+1\right)\left(x-2\right) \\  \\ \text{ Therefore:} \\  \\ 2x^3-3x^2-2x=x\left(2x+1\right)\left(x-2\right) \end{gathered}

The factors would be x, 2x + 1, x -2

7 0
1 year ago
What is the completely factored form of x^4+8x^2-9
denis-greek [22]

Remark

You'll see it a whole lot easier if you make a substitution so that it looks like something you have already seen

Solution

let y = x^2

x^4 = x^2 * x^2

x^4 = y * y

x^4 = y^2

Now the expression becomes

y^2 + 8 y - 9  =  z

(y + 9)(y - 1) = z

Now put the x^2 back in.

(x^2 + 9) ( x^2 - 1) = z

x^2 - 1 becomes x + 1 and x - 1. At this level x^2 + 9 can't be factored.

Answer

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3 0
3 years ago
Read 2 more answers
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Diano4ka-milaya [45]
It is equal to 75%
It shows 3 quarters
On a clock, it would show 45 as the minutes

Fractions:
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6/8
7 0
3 years ago
Read 2 more answers
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Andrew [12]

Answer:

-4 i think

Step-by-step explanation:

divide -12 by 3 to get -4

3 0
3 years ago
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Please Answer These!
maxonik [38]
79.30 ---- 100%
The while store is discounted by 12% So subract 12 from 100

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69.784 + 4.3615
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5 0
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