The difference of a number, w, and 5 will be represented by (w – 5). Twice this would simply multiply this expression by 2, making it 2(w – 5). Finally, just set this expression equal to 2. Your equation is 2(w – 5) = 2.
To solve this, expand the two to the terms in parentheses. Then, solve the rest of the way as you would normally, using addition, subtraction, multiplication, or division to cancel out and move around terms. Remember, what you do on one side must be done to the other!
In 2 2/3 months you ran 76 miles. To know how many miles you ran each month, you can simply use cross multiplication as follows: number of miles per month= (76) / (2 2/3) = 28.5 miles
Let's call the midpoint of GF M. MF = 16/2 = 8 KF = 25.89 MK = sqrt(25.89^2 - 8^2) MK = 24.62 MKF = 8 * 24.62 / 2 = 98.48 square units for one triangle There are 20 of those triangles that make up the decagon. Therefore the total area = 20(98.48) = 1969.6 which would be option C
