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UNO [17]
3 years ago
9

Real numbers $x$ and $y$ satisfy the equation $x^2 + y^2 = 10x - 6y - 34$. What is $x+y$?

Mathematics
1 answer:
nadya68 [22]3 years ago
8 0

Answer:

2

Step-by-step explanation:

The equation can be rewritten as ...

... (x -5)² + (y +3)² = 0 . . . . . . a circle of radius 0 centered at (5, -3)

This is the equation of the point (5, -3). So, ...

... x + y = 5 - 3 = 2

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 What are the similarities and differences between the standard form and vertex form of a quadratic equation?
aniked [119]

Step-by-step explanation:

Standard form is ax^2 + bx + c. Vertex form is a(x-h)^2 + k, which reveals the vertex and axis of symmetry. Factored form is a(x-r)(x-s), which reveals the roots.

6 0
3 years ago
A line includes the points (1, 9) and (0, 5). What is it’s equation in the slope-intercept form?
scoundrel [369]

Equation is y = 4x + 5

Step-by-step explanation:

  • Step 1: Find the slope of the line by m = (y2 - y1)/(x2 - x1). Here y2 = 5, y1 = 9, x1 = 1 and x2 = 0

⇒ m = (5 - 9)/(0 - 1) = 4

  • Step 2: Find y-intercept, b. Since the line passes through (0, 5) b = 5
  • Step 3: Write the equation in slope-intercept form

⇒ y = 4x + 5

5 0
3 years ago
5 quarters weigh approximately 1 ounce. How many ounceswould you expect a collection of quarters worth $15 to weigh?
PSYCHO15rus [73]

5 quarters =1.25$

15$÷1.25$=12

then 15$ in quaters would weigh 12 ounces

8 0
3 years ago
When constructing inscribed polygons and parallel lines, how are the steps similar?
monitta
The intersecting arcs are created and connected. 
8 0
4 years ago
Read 2 more answers
Please help! For the function f(x) = 2x^6 + 3x^4 - 4x^3 + (1/x) - sin(2x) find the first four derivatives.
klasskru [66]

Answer:

See the explanation

Step-by-step explanation:

We know that

f(x) = 2x⁶ + 3x⁴ - 4x³ + (1/x) - sin2x

Lets calculate the derivatives:

f'(x) = 6(2x⁵) + 4(3x³) - 3(4x²) -( 1/x²) - 2(cos2x)

f'(x) = 12x⁵ + 12x³ - 12x² - (1/x²) - 2cos2x

Similarly:

f''(x) = 60x⁴ + 36x² - 24x + (2/x³) + 4sin2x

f'''(x) = 240x³ + 72x - 24 - (6/x⁴) + 8cos2x

Rearrange:

f'''(x) - 240x³ +72x - (6/x⁴) + 8cos2x - 24

f''''(x) = 720x² + 72 + (24/x⁵) - 16sin2x

Rearrange:

f''''(x) = 720x² + (24/x⁵) - 16sin2x +72

8 0
3 years ago
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