Answer:
5 cm
Step-by-step explanation:
Given a semicircle with perimeter 25.71 cm, we are required to find the radius of the circle.
Circumference of a Semicircle
=Length of the Circular part+Length of the diameter


Answer:
26.5454545455
Step-by-step explanation:
Okay, so he started out with 45 lbs.
Let's make 40% into a decimal.
40%= .4
I would multiply .4 to 45.
18.
Add 18 to 45 to get the answer.
The original weight of his bag was 63 pounds.
Answer:
(7,42)
Step-by-step explanation:
Imput the 6x for the Y:
6x=3x+21
move the variable to the left
6x-3x=21
collect like terms:
3x=21
divide both sides by 3x and youll get this for X
x=7
Imput x=7 into the equation
Y=6x7
solve:
y=42
The first step for each of these is adding or subtracting the coefficient to isolate your terms with variables. And then divide to isolate the variable itself.