If f(x)=2x-1 just plug in the 3 where x is. So it would be 2(3)-1=5
Answer:
I'm sorry for answering like that, so here is my actual answer: It is the third one. Again I'm very sorry.
Step-by-step explanation:
The answer would be x = 9.
The average score is 90.6
2x100=200
9x95= 855
10x90=900
80x3=240
1x70=70
Total. 2265
2265/25=90.6
In order to find the area of the semicircle, or the shaded region, we just have to find the area of the entire circle and divide it by 2. The formula for the area of a circle is

. With the given diameter of 12, we can deduce that the radius is 6.
Area of Semicircle = (

/2)
Area of Semicircle = (3.14 x 36/2)
Area of Semicircle = (3.14 x 18)
Area of Semicircle = 56.52

Hope this helps!