Kenji drives 18.4 miles in 16 minutes. He passes a sign, which gives the speed limit as 60 mph. By how much, in mph, did Kenji's average speed exceed the speed limit?

The amount of speed by which kendri exceeded the speed limit is; 9 mph

We are given;

Distance; d = 18.4 miles

Time; t = 16 minutes = (16/60) hours

Now, the formula for speed is;

Speed = distance/time

Thus, let's Calculate kenji's speed;

Kenji's speed = 18.4/(16/60)

Kenji's speed = 69 mph

We are told that the speed limit is to be 60 mph, this means that kendri exceeded the speed limit by;

69 - 60 = 9 mph

Read more about speed and distance at; link

b: |12 – x| ≤ 0.25

step-by-step explanation:      

let x be the possible lengths in inches, of the ribbons jaime cut.

we have been given that jaime is cutting strips of ribbon for a project. he tries to cut each piece to be 12 inches long, but sometimes he cuts it too long or too short by as much as 0.25 inch.  

we can represent this information in an inequality as:

by the definition of absolute value function we will get,

upon combining our inequalities we will get,

therefore, the inequality   describes all the possible lengths (x), in inches, of the ribbons jaime cut.

step-by-step explanation: