Answer:A
Step-by-step explanation:
Answer: radius = 6.5millimeters; Area = 132.7m²
Step-by-step explanation:
The circumference of a circle = 2πr
The area of a circle = πr²
The circumference of a button is 40.8 millimeters. Then we can get the radius, thus will be:
Circumference = 2πr
40.8 = 2 × 3.14 × r
40.8 = 6.28r
r = 40.8/6.28
r = 6.5
Radius is 6.5 millimeters
Area = πr²
Area = 3.14 × 6.5 × 6.5
Area = 132.7m²
First you distribute the -5 into 4x and -7 and get the equation 15-20x+35=5. Next you combine like terms, 15 and 35 and get 50-20x=5. Next you subtract 50 from 5 to get 20x by itself and get 20x=-45. Finally you divide -45 and 20 and get x=9/4 or 2.25