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3 years ago

List four real -word objects that rotate

Mathematics

2 answers:

ValentinkaMS [17]3 years ago

7 0

Globe, Ferris wheels, car,park rides

ArbitrLikvidat [17]3 years ago

5 0

Answer:

planet

atom particles

ball

and child

Step-by-step explanation:

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determine an equation and the radius for the circle that has its centre at the origin (0,0) passes through the point A 4-3

g100num [7]

Given:

The center of the circle is at (0,0).

The circle passes through the point A(4,-3).

To find:

The radius and the equation of the circle.

Solution:

Distance formula:

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

The radius of the circle is the distance between the points (0,0) and (4,-3).

$r=\sqrt{(4-0)^2+(-3-0)^2}$

$r=\sqrt{(4)^2+(-3)^2}$

$r=\sqrt{16+9}$

$r=\sqrt{25}$

$r=5$

So, the radius of the circle is 5 units.

The standard form of a circle is

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

Where, (h,k) is center of circle and r is the radius.

Putting h=0, k=0, r=5, we get

$(x-0)^2+(y-0)^2=5^2$

$x^2+y^2=25$

Therefore, the radius of the circle is 5 units and the equation of the circle is $x^2+y^2=25$ .

6 0

3 years ago

There are two different maps of ohio. The scale on the first map is 1 cm to 10 km. The distance from cleveland to clncinnati is

Ivanshal [37]

1. To answer this question we must keep on mind that we already have the distance from Cleveland to Cincinnati.

2. They tell us that it is 40 centimeters on the first map.

3. If on the first map $1cm = 10km$ then:

$40cm = 10km * 40 = 400km$

4. Then the distance from Cleveland to Cincinnati is 400 kilometers.

5. On the second map $1cm = 50km$

6. Then we want to know how many centimeters represents 400 kilometers on the second map. Therefore:

$400/50= 8$

The answer is: 8 centimeters.

6 0

3 years ago

Find the value of x so that the polygons have the same perimeter.

Novosadov [1.4K]

Answer: x=4

Step-by-step explanation:

The perimeter´s formula for this kind of polygons is

The triangle perimeter would be:

(x+2)+(x+3)+(x+3)

And the rectangle:

(x+2)+(x+2)+x+x

For them to have the same value, we should equal them:

(x+2)+(x+3)+(x+3)=(x+2)+(x+2)+x+x

Working with this:

3x+8=4x+4

x=4

4 0

3 years ago

Three different ropes are used to pull boats in the water. Rope A is

Neko [114]

Answer:

I am pretty sure that it is a

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3 years ago

Julio was making $20 an hour. His wage recently increased to $22 an hour. What was his percent of increase?

Tcecarenko [31]

10% difference divided by original

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4 years ago