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BigorU [14]
3 years ago
15

Which is the standard equation of a circle with diameter with A(0, -1) and B(2, 1)?

Mathematics
1 answer:
Ann [662]3 years ago
8 0

The standart equation:

(x - xc)² + (y - yc)² = r²

For this case, we have the diameter given by 2 points, A and B, the center will be the middle point of this line. We can get the middle point of this line adding both x's and dividing by two, the same for y.

M = (0+2/2, -1+1/2)

M = (2/2, 0/2)

M = (1, 0)

For the radius we need to know the distance between the middle point and A or B,

d = \sqrt{(x_1-x_2)^2+(y_1-y_2)^2}

Let's use B.

d = \sqrt{(1-2)^2+(0-1)^2}

d=\sqrt{(-1)^2+(-1)^2}

d=\sqrt{1+1}

d=\sqrt{2}

Knowing the radius we can put all in the formule

(x - xc)² + (y - yc)² = r²

(x - 1)² + (y - 0)² = \sqrt{2}^2

(x - 1)² + y² = 2

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Yolanda made $192 for 12 hours of work. At the same rate, how many hours would she have to work to make $272?​
denpristay [2]

Answer:

17 hours

take $192 and divide it by 12 so you know how much they make per hour

$192 / 12 = 16

then you're going to take $272 and divide it by what you know now - how much they make per hour (this will get you how many hours they worked)

$272 / 16 = 17

6 0
2 years ago
Help me- what number of units and where
gladu [14]
8 units to the left and 5 units up.

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4 0
3 years ago
If a scale distance of 3.5 inches on a map represent an actual distance of 175 km what actual distance does a scale distance of
gavmur [86]

Considering the definition of map and scale, an actual distance of 269.59 km represent a scale distance of 5.7 inches .

<h3>Definition of map and scale</h3>

A map is a representation of a place, at a size smaller than the real size.

The scale of a cartographic representation is the relationship of similarity between the real dimensions of the geographical space represented and those of its image on the map. That is, the scale is defined as the proportionality relationship that exists between a distance measured on the ground and its corresponding measurement on the map.

One way to represent the scale is by a fraction, which indicates the proportion between the distance on a map and its corresponding distance in reality:

Scale=\frac{distance on the map}{distance in reality}

<h3>Actual distance in this case</h3>

In this case, you know that a scale distance of 3.5 inches on a map represent an actual distance of 175 km.

To know the real distance that represents a scale distance of 5.7 inches, as the scale ratio is the same as in the previous case, it is expressed:

\frac{3.7 inches}{175 km}=\frac{5.7 inches}{distance in reality}

Solving:

\frac{3.7 inches}{175 km}×distance in reality= 5.7 inches

distance in reality= \frac{5.7 inches}{\frac{3.7 inches}{175 km}}

<u><em>distance in reality= 269.59 km</em></u>

In summary, an actual distance of 269.59 km represent a scale distance of 5.7 inches .

Learn more about map and scale:

brainly.com/question/24693076

brainly.com/question/13150795

brainly.com/question/27928319

#SPJ1

8 0
1 year ago
10. June's father is 6 times as old as June. The sum of their ages is no less than 77. What is the youngest age June can be?
Nostrana [21]

Answer:

11

Step-by-step explanation:

11*6=66+11=77

4 0
3 years ago
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80 120 100 miles

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