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mixer [17]
3 years ago
14

Please help and show work!! Even numbers ONLY!! Will give brainliest!!

Mathematics
1 answer:
Aliun [14]3 years ago
5 0
You can do like this
This is my answer 1 to 10
Do it now

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Determine the center and radius: x2 + y2 - 10x + 8y -8 = 0​
Kipish [7]

So our equation currently is ⇒ x^2+y^2-10x+8y-8 = 0

<u>Let's first move all the constant to one side and group 'like variables' together</u>:

      (x^2-10x)+(y^2+8y) = 8

<u>Now lets complete the square of both equations</u>

    (x^2-10x+25)+(y^2+8y +16) = 8 + 25 + 16\\(x-5)^2+(y+4)^2 = 49\\(x-5)^2+(y+4)^2 = 7^2

<u><em>Now we know the circle's general equation format is</em></u>:

   ⇒(x-h)^2+(y-k)^2 = r^2

  • (h, k) ⇒ coordinate of the center of the circle
  • r ⇒ length of radius of circle

<u>Thus the radius of the circle is 7</u>

<u></u>

Hope that helps!

7 0
2 years ago
Charlotte and Savannah go to the movie theater and purchase refreshments for their friends. Charlotte spends a total of $85.00 o
Rudiy27

Answer:

The system of equations that can be used to find the price of one bag of popcorn and the price of one drink are:

8p + 10d = 85

2p + 2d = 20.50

Step-by-step explanation:

Let the price of a bag of popcorn be p

Let the price of one drink be d

Charlotte spends a total of $85.00 on 8 bags of popcorn and 10 drinks. This means

8p + 10d = 85

Savannah spends a total of $20.50 on 2 bags of popcorn and 2 drinks.

2p + 2d = 20.50

The system of equations that can be used to find the price of one bag of popcorn and the price of one drink are:

8p + 10d = 85 ----------1

2p + 2d = 20.50 - - - - - -2

Solving the equations with elimination method, multiply equation 1 by 2 and equation 2 by 8

16p + 20d = 170

16p + 16d = 164

Subtracting,

4d = 6

d = 6/4 = $1.5

Put d = 2 in equation 1

8p + 15 = 85

p = 70/8 = $8.75

4 0
3 years ago
Determine which of the following expressions requires combining like terms before it is considered to be in its simplest form. S
polet [3.4K]
4x + 3y - 7xa2 + a2 - b
3 0
2 years ago
Read 2 more answers
74 rounded to the nearest whole number
ozzi
The answer is 70  . if it is 75 or higher then it wold be rounded to  80 
5 0
3 years ago
Gordo is a fisherman. Darrin claims that Gordo over-estimates the size of his fish by 25%.
White raven [17]

Answer:

The answer will be 30cm

Because 40 divided by 4 is 10 and times it by 3

8 0
2 years ago
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