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olchik [2.2K]
3 years ago
8

What is the radius of the circle that has an area of

*pi" alt="81*x*pi" align="absmiddle" class="latex-formula"> degrees
Mathematics
1 answer:
crimeas [40]3 years ago
7 0

Answer:

R=9

Step-by-step explanation:

the formula for area of a circle is pi r squared

where r denotes the radius of the circle

equating the formula for area with the area of the circle provided

p\i r squared = 81 p\i

r squared = 81

r = radical 81

r =9 inches

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Help me with this problem please
andreev551 [17]

Answer:

y =   \frac{ - 3x + 6}{2}  =  \\ x = 4 \\ y =  \frac{ - 3 \times 4 + 6}{2}  =  \frac{ - 12 + 6}{2}  =   \frac{ - 6}{2}  =  - 3

3 0
3 years ago
What are the points of intersection of the following functions? F(x)=3x+6 and g(x)=2x^2-3
Dvinal [7]

Answer:

(3,15) and (-1.5, 1.5)

Step-by-step explanation:

If g(x) = 2x² - 3

8 0
3 years ago
Fully Factor 3x^2 – 16x + 20
ryzh [129]

Answer:

C. (3x2 - 10) (x - 2)

Step-by-step explanation:

3x^2 - 16x +20

Step 1: Sum = - 16x

Product = 60x^2

Step 2: Find 2 numbers that their sum is -16 and their product is 60. If you do that correctly, then you will get two numbers: 10 and -6

Step 3: Replace -16x with the two numbers found in step 2, then you will have; 3x^2 - 6x - 10x + 20

Step 4: Factorise the equation in step 3, like so;

(3x^2 - 6x)(- 10x + 20)

3x(x - 2) -10(x - 2)

(3x - 10)(x - 2)

To check if the answer is correct, expand the bracket: (3x - 10)(x - 2)

If the bracket is opened properly, you will get 3x^2 - 16x + 20

4 0
3 years ago
How do you factor: 5x^3+30x^2+45x (please show steps)
Natasha2012 [34]

Answer:

Idk

Step-by-step explanation:idk

3 0
3 years ago
Read 2 more answers
A retailer sold an electric item to a customer at a loss of 10 percent the customer purchase it for rs 25425 including 13, perce
Mashutka [201]

Answer: Rs 25,000

Step-by-step explanation:

Given

Retailer sold an electric iron to a customer at a loss of 10%

Suppose the Cost price of iron is x

So, selling price is 0.9x

This price must be equal to 25425+ VAT

\Rightarrow 0.9x=25425-0.13(0.9x)\\\Rightarrow 0.9x+0.117x=25425\\\Rightarrow 1.017x=25425\\\Rightarrow x=\text{Rs }25,000

Thus, the cost price is Rs.25,000

5 0
2 years ago
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