Ron’s class donated d dollars to a local charity. danny’s class donated 21% more than ron’s class. which expression shows the amount danny’s class donated in terms of the amount donated by ron’s class? a. 1.21d b. 0.79d c. d + 0.79d d. d + 0.21
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Total amount donted by Danny class is 1.21d .

Option (a) is correct .

Step-by-step explanation:

As given

Ron’s class donated d dollars to a local charity.

Danny’s class donated 21% more than Ron’s class.

21% is written in the decimal form .

= 0.21

Danny class donted more than Ron class = 0.21 × Ron class donated

                                                                    = 0.21d

Total amount Danny class donated = Ron class donated +  Danny class donted more than Ron class

                                                          = d + 0.21d

                                                         = 1.21d

Therefore total amount donted by Danny class is 1.21d .

Option (a) is correct .

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: