2 years ago

Can you help me out

Mathematics

1 answer:

Advocard [28]2 years ago

8 0

The answer is 20

Your welcome

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A regular polygon of (2A+ 1) sides has 140°<br>as the size of each<br> interior angle. Find A

Irina18 [472]

Answer:

Ext angles = 40 degs 360/40 = 9 sides

Step-by-step explanation:

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3 years ago

Some rational numbers are negative? True or false.

Furkat [3]

Step-by-step explanation:

True

As long as the denominator isn't zero and can be expressed as a fraction with two non zero intergers., the number would be rational

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3 years ago

Cone a and cone b both have a height of 5 in. The volume of cone a is 20.9cubic in, the volume of cone b is 4 times the volume o

Greeley [361]

Answer: two times

Step-by-step explanation:

Given

height of cone A and B $h_a=h_b=5\ in.$

The volume of cone A $V_a=20.9\ in.^3$

The volume of cone B is 4 times of cone A

the volume of a cone is $\frac{1}{3}\pi r^2h$

The volume of cone A

$V_a=\dfrac{1}{3}\pi r_a^2h_a=20.9\quad \ldots(i)$

The volume of cone B

$V_b=\dfrac{1}{3}\pi r_b^2h_b=4\times 20.9\quad \ldots(ii)$

divide (i) and (ii) we get

$\Rightarrow \dfrac{r_a^2}{r_b^2}=\dfrac{1}{4}\\\Rightarrow \dfrac{r_a}{r_b}=\sqrt{\dfrac{1}{4}}=\dfrac{1}{2}\\\Rightarrow \dfrac{d_a}{d_b}=\dfrac{1}{2}\\\Rightarrow d_b=2d_a$

thus, diameter of cone B is twice the diameter of A

4 0

3 years ago

There are 600 people in a concert hall. 2/5 of them are teenagers. 3/8 of the teenagers are girls. How many teenage girls are th

Lemur [1.5K]

There are 90 teenage girls in the concert hall.
2/5 x 600 = 240
3/8 x 240 = 90

6 0

3 years ago

Read 2 more answers

PLZ HELP GUYS I RLLY NEED HELPPP!<br> i rlly rlly rlly need help, i am not good at mathh! :(((((((((

Kisachek [45]

Answer:

1`. y = 4x+6

2. y = -6x + 29

3. y= 3x+1

4. y = x -2

5. y = 11.5x+ 3

6. y = -2x -4

Step-by-step explanation:

5 0

3 years ago

Can you help me out ​

Can you help me out