Annabella time for a race was 24.2 seconds. Another runnee's time was 6.43 seconds faster write and evaluate an equation with to find a variable to find the difference between annabelle's time and the other runners time

Step-by-step explanation:

Given Annabella time for a race is 24.2 seconds, if another runnee's time was 6.43 seconds faster, then the time taken for another  runnee's time will be 24.2 - 6.43 = 17.77secs.

Let a variable X be the difference between annabelle's time and the other runners time.

X = annabelle's time  - other runners time.

X = 24.2 - (24.2 - 6.43)

X = 24.2-24.2+6.43

X = 6.43seconds

Hence the expression between annabelle's time and the other runners time is X = 24.2 - (24.2 - 6.43)

The difference between annabelle's time and the other runners time is 6.43seconds

17/5 sq yd per hour

Step-by-step explanation:

7/8 sq yd per 1/20 hr = x sq yd per 1 hr

We can set up equivalent proportions and cross-multiply.

7/8 × 1 = 1/20 × x

7/8 = 1/20 x

Multiply both sides by 20.

x = 7/8 × 20

  = 140/8

  = 35/2

x = 17.5 sq yd