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3 years ago

4. What is the circumference of a circle with a radius of 4 cm?

Mathematics

1 answer:

zepelin [54]3 years ago

8 0

Answer:

25.13

Step-by-step explanation:

2 π r

2 x π x 4 =25.13

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I NEED HELP WITH MATH

LuckyWell [14K]

Answer:

B and D

Step-by-step explanation:

When you subtract a negative number, you are adding.

7-(-7)=7+7=14

Adding goes right on a number line.

7 0

2 years ago

Read 2 more answers

Find the measure of the arc or angle indicated.

xenn [34]

For each problem, use the inscribed angle theorem.

19.

$45^\circ=\dfrac12m\widehat{QR}\implies m\widehat{QR}=90^\circ$

20.

$95^\circ=\dfrac12m\widehat{ABC}\implies m\widehat{ABC}=190^\circ$

21.

$49^\circ=\dfrac12m\widehat{LR}\implies m\widehat{LR}=98^\circ$

LN is a diameter, so arc LN has measure 180º, and so

$m\widehat{LR}+m\widehat{RN}=m\widehat{LN}=180^\circ\implies m\widehat{RN}=82^\circ$

7 0

3 years ago

What does it mean?<br> how do i solve the question

xxTIMURxx [149]

A means an area
s side of the square, because of all sides are equal
then Area=s*s or Area=s²
so
A=9*9=81yd²

4 0

3 years ago

I need help with this bad

Gala2k [10]

6. A-C
8. A-D
Thats all I know, sorry.

6 0

3 years ago

2 Points

liraira [26]

Two or zero expresses the possible number of positive real solutions for the given polynomial equation.

Answer: Option D

<u>Step-by-step explanation:</u>

Given equation:

$x^{3}-4 x^{2}-7 x+28=0$

First, we put hit and trial method to find out the one solution. So, if we put x=4 then the above expression will become zero. We can also write the above expression as

$(x-4) \times\left(x^{2}-7\right)=0$

We know the formula, $a^{2}-b^{2}=(a+b)(a-b)$ , make use of this, we get

$(x-4) \times(x-\sqrt{7}) \times(x+\sqrt{7})=0$

So, $x=4, \sqrt{7},-\sqrt{7}$

Hence, from the above expression, we have three values of x as x= 4, 2.64 and -2.64

8 0

3 years ago