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Readme [11.4K]
3 years ago
7

PLEASE HELP QUICKLY !!!!!!!!!!!!!! I will give brainliest

Mathematics
1 answer:
svetlana [45]3 years ago
7 0

t=100 I was not sure about y sowyy

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What is the standard form of 5x^2+5y^2-10x+20y-30=0
o-na [289]

5x^2+5y^2-10x+20y-30=0

We need to get the equation in square form

We apply completing the square method

5x^2-10x+5y^2+20y-30=0

Divide all the terms by 5

x^2-2x+y^2+4y-6=0

Group x  terms and y terms separately  

(x^2-2x)+(y^2+4y)-6=0

By completing the square method, we take half of coefficient of x  and square it

\frac{-2}{2} = -1

square it (-1)^2= 1

Add 1 on both sides

(x^2-2x+1)+(y^2+4y)-6=+1

\frac{4}{2} = 2

square it (2)^2= 4

Add 4 on both sides

(x^2-2x+1)+(y^2+4y+4)-6=0+1+4

Add 6 on both sides

(x^2-2x+1)+(y^2+4y+4)=6+1+4

Now factor both parenthesis

(x-1)^2+(y+2)^2=11

The equation of the circle is (x-1)^2+(y+2)^2=11

7 0
4 years ago
What is the measure of an interior angle of a regular polygon iwth 15 sides
KiRa [710]
To find the measure of an interior angle of any regular polygon, we use the formula:

180 * (n-2)  / n, 

where n is the number of sides in the regular polygon.

Therefore, if there are 15 sides in the regular polygon, your answer would be 

180 * (15-2) / 15, 

or when simplified,

180 * 13 / 15

2340 / 15

156 degrees.

Thus, the measure of an interior angle of a regular polygon with 15 sides is 156 degrees.
3 0
4 years ago
Which of these is not an economic activity?
fiasKO [112]

Answer:

D. helping a friend decorate for s party


8 0
3 years ago
Read 2 more answers
I NEED HELP! NO LINKS JUST ANSWERS!
Ket [755]

Answer:

7065 cm^3

Step-by-step explanation:

tell me if you got it wrong

6 0
3 years ago
recipe for brownies calls for 3/4 cup of sugar. Skylar has a bag that contains 9 1/2 cups of sugar. Exactly how many batches of
goblinko [34]
.9 1/2 cups is equal to 19/4. divide 19 by 3 (the 3 from 3/4) and you get 6 1/4. Skylar can make 6 batches with this one bag of sugar.
5 0
3 years ago
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