Answer:
k>12
Step-by-step explanation:
distribute -3 into the parenthesis
-3k-21>-57
add 21 on both sides
-3k>-36
divide both sides by -3
k>12
HOPE THIS HELPS!!!
Answer:
7cm²
Step-by-step explanation:
Should be 7 feet. 6+6=12 then 26-12=14, divide that by 2 (for the other two sides of the rectangle), you'll get 7 ft.
The distance in kilometers in scientific notation 
<h3>Scale factors</h3>
Scale factors are values or constants multiplied with a variable
If Alvin and Simon raced a distance of
kilometers and they need to race 7 times that distance in a kilometer, the distance traveled will be:
- Distance travelled =

- Distance travelled =

Hence the distance in kilometers in scientific notation 
Learn more on distance here: brainly.com/question/23848540