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3 years ago

Please help me on this question?!!!!!!!!

Mathematics

1 answer:

Gnesinka [82]3 years ago

4 0

Answer: 10, 1/10, 2/5

Step-by-step explanation:

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The equation x ^ 2 - 2x + y ^ 2 - 4y = 20 defines a circle in the xy-coordinate plane What is the radius of the circle?

Helga [31]

Answer:

I'll set up the problem and you can do the calculation

Step-by-step explanation:

we need to complete the squares to get the equation in the general form:

${(x - h)}^{2} + {(y - k) }^{2} = {r}^{2}$

where h = the x coordinate of the center

k = the y coordinate of the center

r = the radius

so looking at

${x}^{2} - 2x$

we can see that if use -1 as the constant we have

${(x - 1)}^{2} = {x}^{2} - 2x + 1$

doing the same for y

${y}^{2} - 4y$

we can use -2 as the constant (basically you that the s

quare of the y coefficient )

${(y - 2)}^{2} = {y}^{2} - 4y + 4$

so now we have to add or subtract the constant on the RHS to see what the square of the radius is according to the general form of the equation at the top

20 +1+4=25

Take the square root and you have the radius

4 0

3 years ago

What is 5the answer 5t=t/45

Alexeev081 [22]

$5t=\dfrac{t}{45}\\
225t=t\\
224t=0\\
t=0$

7 0

3 years ago

What are the next few terms after the following sequence? 1, 1/2, 1/3, 1/4

DerKrebs [107]

Answer:

1/5, 1/6, 1/7, 1/8,1/9, 1/10,1/11,1/12

3 0

2 years ago

Which graph represents an exponential function?

geniusboy [140]

Answer:The function that represents an exponential function is the 4th graph and it can be modeled as y = aeᵇˣ.

What are exponential functions?

The exponential functions are written in the form of y = aeᵇˣ, where the output y increases exponentially for the input x.

In order to find the graph that represents an exponential function, we will discuss each of the following graphs,

For the 1st graph, (Black),

In the first graph, the graph is of a parabola, and the function which represents this kind of graph is a quadratic equation, therefore, this graph represents a parabolic equation. It is given by the function,

y=ax²+bx+c or y=a(x-h)²+k

For the 2nd graph, (Red),

In the second graph, the graph represented is the graph of a reciprocal function, the function that can be represented by the graph,

y=a/x + b

For the 3rd graph, (Blue),

In the third graph, the graph represented is the graph of root function, it can be modeled as,

y = a+√(x+b)

For the 4th graph, (Green),

In the fourth graph, the graph represented is the graph of an exponential function, and it can be modeled as,

y = aeᵇˣ

Hence, the function that represents an exponential function is the 4th graph and it can be modeled as y = aeᵇˣ.

Step-by-step explanation:

7 0

2 years ago

Name 3 things you would want to know about skin diseases/disorders?<br> PLEASE HELP

Gelneren [198K]

Answer:

Some skin disorders, like contact dermatitis, are temporary and relatively ... We'll help you identify common skin disorders, explain some treatment ... Here is a list of 25 with pictures. ... from the face down the body three to five days after first symptoms appear ... But what if they're actually a sign of an underlying condition.

Step-by-step explanation:

3 0

2 years ago