So a disc is a circle and the formula for the area of a circle is
![\pi r^{2}](https://tex.z-dn.net/?f=%20%5Cpi%20r%5E%7B2%7D%20)
so 3.14*6^2
=3.14*36
=<span>113.04
area=113cm^2</span>
Answer:
paper clips = $1.85
index cards = $3.95
Step-by-step explanation:
Mark
12 paper clips = x
10 index cards = y
$61.70 total
Janice
15 paper clips = x
7 index cards = y
$55.40 total
12x + 10y = 61.70
15x + 7y = 55.40
*** you want to cancel out one of the letters
(12x + 10y = 61.70) * -7
(15x + 7y = 55.40) * 10
-84x -70y = -431.9
150x + 70y = 554.0
150x + 70y = 554.0
-84x -70y = -431.9
66x + 0 = 122.1
66x = 122.1
x = 122.1 ÷ 66
x = 1.85
plug it back in
15(1.85) + 7y = 55.40
27.75 + 7y = 55.40
7y = 55.40 - 27.75
7y = 27.65
y = 27.65 ÷ 7
y = 3.95
None equation describe equation of circle with radius 9 units.
Explanation:
The standard equation of circle is,
![(x-h)^{2} +(y-k)^{2} =r^{2}](https://tex.z-dn.net/?f=%28x-h%29%5E%7B2%7D%20%2B%28y-k%29%5E%7B2%7D%20%3Dr%5E%7B2%7D)
Where
is center of circle and r represent radius of circle.
here , radius is 9 units
So, Equation of circle, ![(x-h)^{2} +(y-k)^{2} =9^{2}\\\\(x-h)^{2} +(y-k)^{2} =81](https://tex.z-dn.net/?f=%28x-h%29%5E%7B2%7D%20%2B%28y-k%29%5E%7B2%7D%20%3D9%5E%7B2%7D%5C%5C%5C%5C%28x-h%29%5E%7B2%7D%20%2B%28y-k%29%5E%7B2%7D%20%3D81)
Here, center
is not given.
Learn more:
https://brainly.in/question/407
The property that justifies this statement is the Symmetric Property of Congruence.
<h3>What is symmetric property of Congruence?</h3>
The symmetric property of congruence states that If an angle is congruent to another angle, then the second angle is also congruent to the first angle.
A congruent geometric shapes are shapes having the same size and shape, or matching in size and shape and their corresponding angles are equal to each other.
If shape A is congruent to shape B and A= B , then B = A
Similarly,
If angle DEF is equal to angle HJK, then with the law of symmetry property of angle HJk is equal to angle DEF.
learn more about symmetric property of
Congruence from
brainly.com/question/8762236
#SPJ1
699 is closet because as you subtract every number from 750, the smallest answer given is the closest to the number you started with.