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Archy [21]
4 years ago
13

Which of the following is the equation of a circle whose center is at the origin and whose radius is 4?

Mathematics
1 answer:
Angelina_Jolie [31]4 years ago
7 0
The equation of circle is (x-a)^{2} +(y-b)^2=r^2 where (a,b) is the center of circle and r is radius of circle. In your question, (a,b)=(0,0) and r=4 so, the equation is x^2+y^2=4^2
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Help!! <br> Show that 1 + tan2(x) = sec2(x)​
Papessa [141]

Answer:

tan2(x) + 1 = sin2(x)/cos2(x) + 1 = [sin2(x) + cos2(x)]/cos2(x) = 1/cos2(x) = (1/cos(x))2 = sec2(x). Thus tan2(x) + 1 = sec2(x).

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Rectangle ABCD is graphed in the coordinate plane. The following are the vertices of the rectangle: A(-4, -2), B(-2, -2), C(-2,
vladimir2022 [97]

Answer:

The area of rectangle ABCD is 18\ units^2

Step-by-step explanation:

Plot the figure to better understand the problem

we have the vertices

A(-4, -2), B(-2, -2), C(-2, 7), D(-4, 7)

see the  attached figure

The area of the rectangle is equal to

A=LW

where

L is the length

W is the width

In this problem we have

L=BC=7-(-2)=9\ units ---> difference of the y-coordinates

W=AB=-2-(-4)=2\ units ---> difference of the x-coordinates

substitute

A=(9)(2)=18\ units^2

3 0
4 years ago
Halp me :( Lots of points. will mark
frutty [35]

Answer:

y=4/5x+3

Step-by-step explanation:

7 0
3 years ago
A business owner buys two new office buildings. She pays $635, 895 for one building. She pays $643, 225 for the other building.
Natali5045456 [20]
Part A
From the two buildings she rents, the building costing $643, 225 price is greater than the other that costs <span>$635, 895

Part B
Round to the nearest ten thousand:
</span><span>$635, 895 ~ $640, 000
this is because 5,895 rounds to 6,000, and then this rounds to 10,000

</span><span>$643, 225 ~ $640, 000
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5 0
4 years ago
Which inequality is true if p= 3.4?
BigorU [14]

Answer:

None of the equations are true for p = 3.4

Step-by-step explanation:

In order for the inequality to be valid we need to apply the value for p and check wether or not it is true. We gonna do for each of the following:

A. 3p < 10.2

3*3.4 < 10.2

10.2 < 10.2

Not true, since the left side is equal to the right side and not less.

B. 13.6 < 3.9p

13.6 < 3.9*3.4

13.6 < 13.26

Not true since 13.6 is greater than 13.26

C. 5p > 17.1

5*3.4 > 17.1

17 > 17.1

Not true since 17 is less than 17.1

D. 8.5 > 2.5p

8.5 > 2.5*3.4

8.5 > 8.5

Not true since the left side is equal to the right side.

7 0
4 years ago
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