Answer: r = -2.4
Step-by-step explanation:
Simplifying 6r + 4 = r + -8 Reorder the terms: 4 + 6r = r + -8 Reorder the terms: 4 + 6r = -8 + r Solving 4 + 6r = -8 + r Solving for variable 'r'. -8 + -4 = -12
5r = -12
The difference between the two wind speeds is 2.7. If you use subtraction, you'll see the answer. Hope this helps!
Aye Sir!
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.
#SPJ1
