Answer:
a=1
Step-by-step explanation:
The answer to this problem is 1. This is the answer because using PEMDAS, you would first have to distribute -3.
So: 9a+ -6a+12=15
Combine like terms:
3a+12=15
Subtract 12 on each side. 3a= 3
Divide 3 on each side.
a=1
Hope this helps!! :D
The perimeter of the entire figure is 62.8 cm.
Given, that the diameter of the inner semicircles is 9 cm and the width between the outer and inner semicircles is 2 cm.
The radius of the inner semicircle =4.5 cm and the radius of outer semicircle =5.5 cm (∵Diameter=9+2=11 cm)
We need to find the perimeter of the entire figure.
<h3>What is the perimeter?</h3>
A perimeter is a closed path that encompasses, surrounds, or outlines either a two-dimensional shape or a one-dimensional length. The perimeter of a circle or an ellipse is called its circumference.
We know that, the circumference of a semicircle=πr and the circumference of two semicircles=2πr
Thus, the circumference of inner semicircles=2×3.14×4.5=28.26 cm
The circumference of outer semicircles=2×3.14×5.5=34.54 cm
The perimeter of the entire figure=28.26+34.54=62.8 cm
Therefore, the perimeter of the entire figure is 62.8 cm.
To learn more about the perimeter visit:
brainly.com/question/6465134.
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Answer:
-2
Step-by-step explanation:
substitute:
(10 + 6)÷4(-2)
= 16÷-8
-2
Answer:
Each noble, on average, eats 3 tarts
Each peasant eats 1/2 tarts
Step-by-step explanation:
Answer:
<em>here </em><em> </em><em>,</em>
<em>8</em><em>1</em><em>=</em><em>3</em><em>x</em>
<em>or </em><em>,</em><em> </em><em>8</em><em>1</em><em>/</em><em>3</em><em>=</em><em>x</em>
<em>or,</em><em>2</em><em>7</em><em>=</em><em>x</em>
<em>hence </em><em>,</em><em>the </em><em>value </em><em>of </em><em>x=</em><em>2</em><em>7</em>
