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BlackZzzverrR [31]
3 years ago
7

Dont understand this wuestinb

Mathematics
1 answer:
Gala2k [10]3 years ago
4 0
10. C=2 x r x pi
      C= 2 x 3.1 x 3.14
      C = 19.468

11. C=2 x r x pi
      18.84= pi x d
       D= 6
       r = 3
       
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Please help with this
sergiy2304 [10]

Answer:

the answer is what ever you want it to be

Step-by-step explanation:

kk

6 0
3 years ago
Which of these functions had a greater rate of change than the function graphed below, and why?
Mrac [35]

Answer:

C

Step-by-step explanation:

When we talk of rate of change, we talk of the slope of the line

If we had a line;

y = mx + b

m is the slope ( which is the rate of change)

To get the slope of the line, we select any two points on the line and apply the slope formula

m = y2-y1/x2-x1

let us take points (0,0) and (3,9)

m = 9-0/3-0 = 9/3 = 3

The slope here is 3

so from the option, we can see that the third option is the correct answer

7 0
3 years ago
For what real value of $v$ is $\frac{-21-\sqrt{301}}{10}$ a root of $5x^2+21x+v$?
Degger [83]

Answer:

v = 7

is the value for which

x = (-21 - √301)/10

is a solution to the quadratic equation

5x² + 21x + v = 0

Step-by-step explanation:

Given that

x = (-21 - √301)/10 .....................(1)

is a root of the quadratic equation

5x² + 21x + v = 0 ........................(2)

We want to find the value of v foe which the equation is true.

Consider the quadratic formula

x = [-b ± √(b² - 4av)]/2a ..................(3)

Comparing (3) with (2), notice that

b = 21

2a = 10

=> a = 10/2 = 5

and

b² - 4av = 301

=> 21² - 4(5)v = 301

-20v = 301 - 441

-20v = -140

v = -140/(-20)

v = 7

That is a = 5, b = 21, and v = 7

The equation is then

5x² + 21x + 7 = 0

6 0
3 years ago
Multiply.
Gekata [30.6K]

Answer:

=23x2+3x

Step-by-step explanation:

x2+4x+22x2+3x−4x

=x2+4x+22x2+3x+−4x

Hope this helps

7 0
3 years ago
250 people were asked to name their favorite fruit. Of those surveyed, how many people prefer peaches? 44% berries, 32% Peaches,
alexdok [17]

Answer:

80 people prefered peaches

Step-by-step explanation:

250-68%=80 people

6 0
3 years ago
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