6) Frazer cycles the first 20 miles at an average speed of 21mph. The second part is more uphill, and he only manages 13mph. By what percentage did his
speed decrease?
How to solve

9514 1404 393

  38.1% decrease

Step-by-step explanation:

A percentage change is found from ...

  % change = (change)/(original amount) × 100%

  = (new value - original amount)/(original amount) × 100%

  = (13 -21)/21 × 100% = -8/21 × 100% ≈ -38.1%

Frazer's speed decreased by 38.1% during the second part.

Additional comment

A negative % change represents a decrease; a positive % change represents an increase.

area = length x width

length = 2 x width

32 = 2 x width x width

32 = 2 x width^2

36 = width ^2  

width = 6

length = 12

area is 32

perimeter = 2 x 12 + 2 x 6 = 24 + 12 = 36

step-by-step explanation:

(3x-8) or (3x+8)

step-by-step explanation: