1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tems11 [23]
3 years ago
15

Find the points of intersection of the circles x²+y²-15=0 and x²-4x+y²+2y-5=0. Check by graphing the equations.

Mathematics
1 answer:
mote1985 [20]3 years ago
6 0

Answer:

The answer to your question is:

Step-by-step explanation:

Solve by elimination

                                           -  x²  -  y²               + 15   =  0

                                             x²   +y²  - 4x + 2y - 5    =  0

                                             0       0   - 4x + 2y + 10 = 0

Solve it for x                          -4x = -2y - 10 ;     x = 1/2y + 5/2

Substitution

                                    ( 1/2y + 5/2)²+ y² - 15=0                      

                                    (y² + 2y + 25)/4 + y² - 15 = 0

                                     y² + 10y + 25 + 4y² - 60 = 0

                                     5y² + 10y - 35 = 0

Solve the equation

                               y1 = -3.83                y2 = 1.83

                             x1 = (5 - 3.83) /2        x2 = (5 + 1.83) / 2

                             x1 = 0.59                    x2 = 3.42

      Point 1 = (0.59 , -3.83)                     Point 2 ( 3.42, 1.83)

You might be interested in
A person runs 1/5 miles in 1/40<br> Hour The person's speed is<br> miles per hour.
Minchanka [31]

Answer:

1/5 × 40 = 8

the person's speed is 8 miles per hour

5 0
3 years ago
Find the equation for intercept x 4 and y -7​
nadezda [96]

Answer:

y = \frac{-7x}{4} - 14

Step-by-step explanation:

The equation used to find the equation for a line with two intercepts is called point slope form. y - y_{1} = m(x - x_{1}) , where y_{1} and x_{1} are the intercept points and m is the slope.

However, we need the slope to use this formula.

Use m = \frac{y_{1} - y_{2} }{x_{1} - x_{2}}

m = \frac{y_{1} - y_{2} }{x_{1} - x_{2}}

m = \frac{((0) - (7))}{((4) - (0))}

m = \frac{-7}{4}

y - y_{1} = m(x - x_{1})

y - ( -7 ) = m ( x - ( 4 ) )

y - ( -7 ) = -7/4 ( x - ( 4 ) )

y + 7 = -7/4 ( x + 4 )

y + 7 = \frac{-7(x+4)}{4}

y + 7 = \frac{-7x-28}{4}

y + 7 = \frac{-7x}{4} - 7

y + 7 = \frac{-7x}{4} - 7 - 7

y = \frac{-7x}{4} - 14

8 0
3 years ago
Help asap please,i don’t get the question
mario62 [17]

Answer:

see below

Step-by-step explanation:

I do not know what the 'given expression' is, bu the three UN-highlighted expressions in each question 1 and 2  are equivalent

  Only the highlighted one is not equiv to the other three

3 0
2 years ago
The angle of elevation to a nearby tree from a point on the ground is measured to be 61 ∘ ∘ . How tall is the tree if the point
marishachu [46]

Answer:

106.44 ft

Step-by-step explanation:

tan = opp/adj

tan61 = opp/59

59*tan61 = opp

opp = 106.438817561014012

Rounded

106.44 ft

5 0
3 years ago
-10x-15y=-30 find y<br><br>show work please
Effectus [21]

-10x - 15y = -30

-10x + 30 = 15y

(30 - 10x) / 15 = y

(30/15) - (10x/15) = y

2 - 2x/3 = y


Answer: y = -2x/3 + 2 or y = 2- 2x/3

5 0
3 years ago
Other questions:
  • The solution set for -2x2 + 12x = 0 is {0, 12} {0, -12} {0, 6} {0, -6} .
    15·1 answer
  • What is 34 1/2 as a decimal
    6·2 answers
  • Complete the equivalent ratio. How many ounces are in 2 cups?
    7·1 answer
  • Is this graph a function?
    15·1 answer
  • 6c-9d=111 5c-9d=103<br>how to solve this problem ​
    7·2 answers
  • Find 3 consecutive even integers such that 5 times the second is 82 more than the first .
    13·1 answer
  • 11 minutes left please help
    8·2 answers
  • A line's slope is 1, and its y-intercept is -10. What is its equation in slope-intercept form?
    11·1 answer
  • (100+4z) 20? What is the answer?
    5·1 answer
  • HELPPPP!!! I NEED SOME HELP PLSS
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!