in the diagram, r1=40.0 ohms. r2=25.4ohm, and r3=70.8 ohms. What is the equivalent resistance in the group. Thank you .3.

Acircular city park has a sidewalk directly through the middle that is 111 - feet long. if each bag of fertilizer covers 50 square feet, then determine how many bags of fertilizers the parks and recreation department needs to use to cover the circular park. ignore all the sidewalks around and through the park.

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28