Answer: The required expression is 3x+4.
Step-by-step explanation:
Since we have given that
Let the number of wristbands that Shelly has be 'x'
Let the number of wristbands that Kaitaia has be 
Let the number of wristbands that Rea has be three more than twice the number that shelly has be

According to question, the expression that shows the number of wristbands more Katia has than Rea is given by

Hence, the required expression is 3x+4.
Answer:
<h2>The coordinates are (50, 103)</h2>
Step-by-step explanation:
The three hallways are AB, BC, CD.
The co-ordinate of D is (50, 75).
The school's flagpole is 28 meters right of the point D.
Hence the y-coordinate for the flagpole will be same as D, that is 75.
The x-coordinate will be (28 + 75) = 103.
The location of the school's flagpole will be represented by (50, 103)
Answer: The required discount is $819 and the rate of discount is 20.48%.
Step-by-step explanation: Given that a home theater system is marked down from $3999 to $3180.
We are to find the discount and the rate of discount.
The discount will be given by actual price minus the marked price.
We have
Actual price = $ 3999 and marked price = $3180.
So, the discount is given by

And the rate of discount is

Thus, the required discount is $819 and the rate of discount is 20.48%.