Answer fast worth 30 points

a communtiy group is planning the expansion of a square flower garden in a city park. if each side of the original garden is inreased by 9 meters the new total area of the garden will be 269 sqaure meters. find the length of each side of the original garden

a. 9m

b. 13m

c. 2m

d. 4m

what are the solutions of the equation: z^2-6z-27=0

a.3,9

b.3,-9

c. -3,9

d. -3,-9

Emily's speed is the greatest, therefor she is the fastest at a speed of 1.78 m/s

Step-by-step explanation:

To determine who swam the fastest we need to calculate the speed for each swimmer;

Speed=Distance/time

Deborah covered a distance of 50 meters in 40.8 seconds,

Deborah's speed=(Deborah's distance/Time)=(50/40.8)=1.23 meters per second

Robert covered a distance of 100 meters in 60.2 seconds,

Robert's speed=(Robert's distance/Time)=(100/60.2)=1.66 meters per second

Emily covered a distance of 200 meters in 112.4 seconds,

Emily's speed=(Emily's distance/Time)=(200/112.4)=1.78 meters per second

From the speeds for each we can conclude that;

Emily's speed(1.78 m/s)>Robert's speed(1.66 m/s)>Deborah's speed(1.23 m/s)

Emily's speed is the greatest, therefor she is the fastest at a speed of 1.78 m/s